diff --git a/COPYING b/COPYING
deleted file mode 100644
--- a/COPYING
+++ /dev/null
@@ -1,674 +0,0 @@
-                    GNU GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
-
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
-                            Preamble
-
-  The GNU General Public License is a free, copyleft license for
-software and other kinds of works.
-
-  The licenses for most software and other practical works are designed
-to take away your freedom to share and change the works.  By contrast,
-the GNU General Public License is intended to guarantee your freedom to
-share and change all versions of a program--to make sure it remains free
-software for all its users.  We, the Free Software Foundation, use the
-GNU General Public License for most of our software; it applies also to
-any other work released this way by its authors.  You can apply it to
-your programs, too.
-
-  When we speak of free software, we are referring to freedom, not
-price.  Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-them if you wish), that you receive source code or can get it if you
-want it, that you can change the software or use pieces of it in new
-free programs, and that you know you can do these things.
-
-  To protect your rights, we need to prevent others from denying you
-these rights or asking you to surrender the rights.  Therefore, you have
-certain responsibilities if you distribute copies of the software, or if
-you modify it: responsibilities to respect the freedom of others.
-
-  For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must pass on to the recipients the same
-freedoms that you received.  You must make sure that they, too, receive
-or can get the source code.  And you must show them these terms so they
-know their rights.
-
-  Developers that use the GNU GPL protect your rights with two steps:
-(1) assert copyright on the software, and (2) offer you this License
-giving you legal permission to copy, distribute and/or modify it.
-
-  For the developers' and authors' protection, the GPL clearly explains
-that there is no warranty for this free software.  For both users' and
-authors' sake, the GPL requires that modified versions be marked as
-changed, so that their problems will not be attributed erroneously to
-authors of previous versions.
-
-  Some devices are designed to deny users access to install or run
-modified versions of the software inside them, although the manufacturer
-can do so.  This is fundamentally incompatible with the aim of
-protecting users' freedom to change the software.  The systematic
-pattern of such abuse occurs in the area of products for individuals to
-use, which is precisely where it is most unacceptable.  Therefore, we
-have designed this version of the GPL to prohibit the practice for those
-products.  If such problems arise substantially in other domains, we
-stand ready to extend this provision to those domains in future versions
-of the GPL, as needed to protect the freedom of users.
-
-  Finally, every program is threatened constantly by software patents.
-States should not allow patents to restrict development and use of
-software on general-purpose computers, but in those that do, we wish to
-avoid the special danger that patents applied to a free program could
-make it effectively proprietary.  To prevent this, the GPL assures that
-patents cannot be used to render the program non-free.
-
-  The precise terms and conditions for copying, distribution and
-modification follow.
-
-                       TERMS AND CONDITIONS
-
-  0. Definitions.
-
-  "This License" refers to version 3 of the GNU General Public License.
-
-  "Copyright" also means copyright-like laws that apply to other kinds of
-works, such as semiconductor masks.
-
-  "The Program" refers to any copyrightable work licensed under this
-License.  Each licensee is addressed as "you".  "Licensees" and
-"recipients" may be individuals or organizations.
-
-  To "modify" a work means to copy from or adapt all or part of the work
-in a fashion requiring copyright permission, other than the making of an
-exact copy.  The resulting work is called a "modified version" of the
-earlier work or a work "based on" the earlier work.
-
-  A "covered work" means either the unmodified Program or a work based
-on the Program.
-
-  To "propagate" a work means to do anything with it that, without
-permission, would make you directly or secondarily liable for
-infringement under applicable copyright law, except executing it on a
-computer or modifying a private copy.  Propagation includes copying,
-distribution (with or without modification), making available to the
-public, and in some countries other activities as well.
-
-  To "convey" a work means any kind of propagation that enables other
-parties to make or receive copies.  Mere interaction with a user through
-a computer network, with no transfer of a copy, is not conveying.
-
-  An interactive user interface displays "Appropriate Legal Notices"
-to the extent that it includes a convenient and prominently visible
-feature that (1) displays an appropriate copyright notice, and (2)
-tells the user that there is no warranty for the work (except to the
-extent that warranties are provided), that licensees may convey the
-work under this License, and how to view a copy of this License.  If
-the interface presents a list of user commands or options, such as a
-menu, a prominent item in the list meets this criterion.
-
-  1. Source Code.
-
-  The "source code" for a work means the preferred form of the work
-for making modifications to it.  "Object code" means any non-source
-form of a work.
-
-  A "Standard Interface" means an interface that either is an official
-standard defined by a recognized standards body, or, in the case of
-interfaces specified for a particular programming language, one that
-is widely used among developers working in that language.
-
-  The "System Libraries" of an executable work include anything, other
-than the work as a whole, that (a) is included in the normal form of
-packaging a Major Component, but which is not part of that Major
-Component, and (b) serves only to enable use of the work with that
-Major Component, or to implement a Standard Interface for which an
-implementation is available to the public in source code form.  A
-"Major Component", in this context, means a major essential component
-(kernel, window system, and so on) of the specific operating system
-(if any) on which the executable work runs, or a compiler used to
-produce the work, or an object code interpreter used to run it.
-
-  The "Corresponding Source" for a work in object code form means all
-the source code needed to generate, install, and (for an executable
-work) run the object code and to modify the work, including scripts to
-control those activities.  However, it does not include the work's
-System Libraries, or general-purpose tools or generally available free
-programs which are used unmodified in performing those activities but
-which are not part of the work.  For example, Corresponding Source
-includes interface definition files associated with source files for
-the work, and the source code for shared libraries and dynamically
-linked subprograms that the work is specifically designed to require,
-such as by intimate data communication or control flow between those
-subprograms and other parts of the work.
-
-  The Corresponding Source need not include anything that users
-can regenerate automatically from other parts of the Corresponding
-Source.
-
-  The Corresponding Source for a work in source code form is that
-same work.
-
-  2. Basic Permissions.
-
-  All rights granted under this License are granted for the term of
-copyright on the Program, and are irrevocable provided the stated
-conditions are met.  This License explicitly affirms your unlimited
-permission to run the unmodified Program.  The output from running a
-covered work is covered by this License only if the output, given its
-content, constitutes a covered work.  This License acknowledges your
-rights of fair use or other equivalent, as provided by copyright law.
-
-  You may make, run and propagate covered works that you do not
-convey, without conditions so long as your license otherwise remains
-in force.  You may convey covered works to others for the sole purpose
-of having them make modifications exclusively for you, or provide you
-with facilities for running those works, provided that you comply with
-the terms of this License in conveying all material for which you do
-not control copyright.  Those thus making or running the covered works
-for you must do so exclusively on your behalf, under your direction
-and control, on terms that prohibit them from making any copies of
-your copyrighted material outside their relationship with you.
-
-  Conveying under any other circumstances is permitted solely under
-the conditions stated below.  Sublicensing is not allowed; section 10
-makes it unnecessary.
-
-  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
-
-  No covered work shall be deemed part of an effective technological
-measure under any applicable law fulfilling obligations under article
-11 of the WIPO copyright treaty adopted on 20 December 1996, or
-similar laws prohibiting or restricting circumvention of such
-measures.
-
-  When you convey a covered work, you waive any legal power to forbid
-circumvention of technological measures to the extent such circumvention
-is effected by exercising rights under this License with respect to
-the covered work, and you disclaim any intention to limit operation or
-modification of the work as a means of enforcing, against the work's
-users, your or third parties' legal rights to forbid circumvention of
-technological measures.
-
-  4. Conveying Verbatim Copies.
-
-  You may convey verbatim copies of the Program's source code as you
-receive it, in any medium, provided that you conspicuously and
-appropriately publish on each copy an appropriate copyright notice;
-keep intact all notices stating that this License and any
-non-permissive terms added in accord with section 7 apply to the code;
-keep intact all notices of the absence of any warranty; and give all
-recipients a copy of this License along with the Program.
-
-  You may charge any price or no price for each copy that you convey,
-and you may offer support or warranty protection for a fee.
-
-  5. Conveying Modified Source Versions.
-
-  You may convey a work based on the Program, or the modifications to
-produce it from the Program, in the form of source code under the
-terms of section 4, provided that you also meet all of these conditions:
-
-    a) The work must carry prominent notices stating that you modified
-    it, and giving a relevant date.
-
-    b) The work must carry prominent notices stating that it is
-    released under this License and any conditions added under section
-    7.  This requirement modifies the requirement in section 4 to
-    "keep intact all notices".
-
-    c) You must license the entire work, as a whole, under this
-    License to anyone who comes into possession of a copy.  This
-    License will therefore apply, along with any applicable section 7
-    additional terms, to the whole of the work, and all its parts,
-    regardless of how they are packaged.  This License gives no
-    permission to license the work in any other way, but it does not
-    invalidate such permission if you have separately received it.
-
-    d) If the work has interactive user interfaces, each must display
-    Appropriate Legal Notices; however, if the Program has interactive
-    interfaces that do not display Appropriate Legal Notices, your
-    work need not make them do so.
-
-  A compilation of a covered work with other separate and independent
-works, which are not by their nature extensions of the covered work,
-and which are not combined with it such as to form a larger program,
-in or on a volume of a storage or distribution medium, is called an
-"aggregate" if the compilation and its resulting copyright are not
-used to limit the access or legal rights of the compilation's users
-beyond what the individual works permit.  Inclusion of a covered work
-in an aggregate does not cause this License to apply to the other
-parts of the aggregate.
-
-  6. Conveying Non-Source Forms.
-
-  You may convey a covered work in object code form under the terms
-of sections 4 and 5, provided that you also convey the
-machine-readable Corresponding Source under the terms of this License,
-in one of these ways:
-
-    a) Convey the object code in, or embodied in, a physical product
-    (including a physical distribution medium), accompanied by the
-    Corresponding Source fixed on a durable physical medium
-    customarily used for software interchange.
-
-    b) Convey the object code in, or embodied in, a physical product
-    (including a physical distribution medium), accompanied by a
-    written offer, valid for at least three years and valid for as
-    long as you offer spare parts or customer support for that product
-    model, to give anyone who possesses the object code either (1) a
-    copy of the Corresponding Source for all the software in the
-    product that is covered by this License, on a durable physical
-    medium customarily used for software interchange, for a price no
-    more than your reasonable cost of physically performing this
-    conveying of source, or (2) access to copy the
-    Corresponding Source from a network server at no charge.
-
-    c) Convey individual copies of the object code with a copy of the
-    written offer to provide the Corresponding Source.  This
-    alternative is allowed only occasionally and noncommercially, and
-    only if you received the object code with such an offer, in accord
-    with subsection 6b.
-
-    d) Convey the object code by offering access from a designated
-    place (gratis or for a charge), and offer equivalent access to the
-    Corresponding Source in the same way through the same place at no
-    further charge.  You need not require recipients to copy the
-    Corresponding Source along with the object code.  If the place to
-    copy the object code is a network server, the Corresponding Source
-    may be on a different server (operated by you or a third party)
-    that supports equivalent copying facilities, provided you maintain
-    clear directions next to the object code saying where to find the
-    Corresponding Source.  Regardless of what server hosts the
-    Corresponding Source, you remain obligated to ensure that it is
-    available for as long as needed to satisfy these requirements.
-
-    e) Convey the object code using peer-to-peer transmission, provided
-    you inform other peers where the object code and Corresponding
-    Source of the work are being offered to the general public at no
-    charge under subsection 6d.
-
-  A separable portion of the object code, whose source code is excluded
-from the Corresponding Source as a System Library, need not be
-included in conveying the object code work.
-
-  A "User Product" is either (1) a "consumer product", which means any
-tangible personal property which is normally used for personal, family,
-or household purposes, or (2) anything designed or sold for incorporation
-into a dwelling.  In determining whether a product is a consumer product,
-doubtful cases shall be resolved in favor of coverage.  For a particular
-product received by a particular user, "normally used" refers to a
-typical or common use of that class of product, regardless of the status
-of the particular user or of the way in which the particular user
-actually uses, or expects or is expected to use, the product.  A product
-is a consumer product regardless of whether the product has substantial
-commercial, industrial or non-consumer uses, unless such uses represent
-the only significant mode of use of the product.
-
-  "Installation Information" for a User Product means any methods,
-procedures, authorization keys, or other information required to install
-and execute modified versions of a covered work in that User Product from
-a modified version of its Corresponding Source.  The information must
-suffice to ensure that the continued functioning of the modified object
-code is in no case prevented or interfered with solely because
-modification has been made.
-
-  If you convey an object code work under this section in, or with, or
-specifically for use in, a User Product, and the conveying occurs as
-part of a transaction in which the right of possession and use of the
-User Product is transferred to the recipient in perpetuity or for a
-fixed term (regardless of how the transaction is characterized), the
-Corresponding Source conveyed under this section must be accompanied
-by the Installation Information.  But this requirement does not apply
-if neither you nor any third party retains the ability to install
-modified object code on the User Product (for example, the work has
-been installed in ROM).
-
-  The requirement to provide Installation Information does not include a
-requirement to continue to provide support service, warranty, or updates
-for a work that has been modified or installed by the recipient, or for
-the User Product in which it has been modified or installed.  Access to a
-network may be denied when the modification itself materially and
-adversely affects the operation of the network or violates the rules and
-protocols for communication across the network.
-
-  Corresponding Source conveyed, and Installation Information provided,
-in accord with this section must be in a format that is publicly
-documented (and with an implementation available to the public in
-source code form), and must require no special password or key for
-unpacking, reading or copying.
-
-  7. Additional Terms.
-
-  "Additional permissions" are terms that supplement the terms of this
-License by making exceptions from one or more of its conditions.
-Additional permissions that are applicable to the entire Program shall
-be treated as though they were included in this License, to the extent
-that they are valid under applicable law.  If additional permissions
-apply only to part of the Program, that part may be used separately
-under those permissions, but the entire Program remains governed by
-this License without regard to the additional permissions.
-
-  When you convey a copy of a covered work, you may at your option
-remove any additional permissions from that copy, or from any part of
-it.  (Additional permissions may be written to require their own
-removal in certain cases when you modify the work.)  You may place
-additional permissions on material, added by you to a covered work,
-for which you have or can give appropriate copyright permission.
-
-  Notwithstanding any other provision of this License, for material you
-add to a covered work, you may (if authorized by the copyright holders of
-that material) supplement the terms of this License with terms:
-
-    a) Disclaiming warranty or limiting liability differently from the
-    terms of sections 15 and 16 of this License; or
-
-    b) Requiring preservation of specified reasonable legal notices or
-    author attributions in that material or in the Appropriate Legal
-    Notices displayed by works containing it; or
-
-    c) Prohibiting misrepresentation of the origin of that material, or
-    requiring that modified versions of such material be marked in
-    reasonable ways as different from the original version; or
-
-    d) Limiting the use for publicity purposes of names of licensors or
-    authors of the material; or
-
-    e) Declining to grant rights under trademark law for use of some
-    trade names, trademarks, or service marks; or
-
-    f) Requiring indemnification of licensors and authors of that
-    material by anyone who conveys the material (or modified versions of
-    it) with contractual assumptions of liability to the recipient, for
-    any liability that these contractual assumptions directly impose on
-    those licensors and authors.
-
-  All other non-permissive additional terms are considered "further
-restrictions" within the meaning of section 10.  If the Program as you
-received it, or any part of it, contains a notice stating that it is
-governed by this License along with a term that is a further
-restriction, you may remove that term.  If a license document contains
-a further restriction but permits relicensing or conveying under this
-License, you may add to a covered work material governed by the terms
-of that license document, provided that the further restriction does
-not survive such relicensing or conveying.
-
-  If you add terms to a covered work in accord with this section, you
-must place, in the relevant source files, a statement of the
-additional terms that apply to those files, or a notice indicating
-where to find the applicable terms.
-
-  Additional terms, permissive or non-permissive, may be stated in the
-form of a separately written license, or stated as exceptions;
-the above requirements apply either way.
-
-  8. Termination.
-
-  You may not propagate or modify a covered work except as expressly
-provided under this License.  Any attempt otherwise to propagate or
-modify it is void, and will automatically terminate your rights under
-this License (including any patent licenses granted under the third
-paragraph of section 11).
-
-  However, if you cease all violation of this License, then your
-license from a particular copyright holder is reinstated (a)
-provisionally, unless and until the copyright holder explicitly and
-finally terminates your license, and (b) permanently, if the copyright
-holder fails to notify you of the violation by some reasonable means
-prior to 60 days after the cessation.
-
-  Moreover, your license from a particular copyright holder is
-reinstated permanently if the copyright holder notifies you of the
-violation by some reasonable means, this is the first time you have
-received notice of violation of this License (for any work) from that
-copyright holder, and you cure the violation prior to 30 days after
-your receipt of the notice.
-
-  Termination of your rights under this section does not terminate the
-licenses of parties who have received copies or rights from you under
-this License.  If your rights have been terminated and not permanently
-reinstated, you do not qualify to receive new licenses for the same
-material under section 10.
-
-  9. Acceptance Not Required for Having Copies.
-
-  You are not required to accept this License in order to receive or
-run a copy of the Program.  Ancillary propagation of a covered work
-occurring solely as a consequence of using peer-to-peer transmission
-to receive a copy likewise does not require acceptance.  However,
-nothing other than this License grants you permission to propagate or
-modify any covered work.  These actions infringe copyright if you do
-not accept this License.  Therefore, by modifying or propagating a
-covered work, you indicate your acceptance of this License to do so.
-
-  10. Automatic Licensing of Downstream Recipients.
-
-  Each time you convey a covered work, the recipient automatically
-receives a license from the original licensors, to run, modify and
-propagate that work, subject to this License.  You are not responsible
-for enforcing compliance by third parties with this License.
-
-  An "entity transaction" is a transaction transferring control of an
-organization, or substantially all assets of one, or subdividing an
-organization, or merging organizations.  If propagation of a covered
-work results from an entity transaction, each party to that
-transaction who receives a copy of the work also receives whatever
-licenses to the work the party's predecessor in interest had or could
-give under the previous paragraph, plus a right to possession of the
-Corresponding Source of the work from the predecessor in interest, if
-the predecessor has it or can get it with reasonable efforts.
-
-  You may not impose any further restrictions on the exercise of the
-rights granted or affirmed under this License.  For example, you may
-not impose a license fee, royalty, or other charge for exercise of
-rights granted under this License, and you may not initiate litigation
-(including a cross-claim or counterclaim in a lawsuit) alleging that
-any patent claim is infringed by making, using, selling, offering for
-sale, or importing the Program or any portion of it.
-
-  11. Patents.
-
-  A "contributor" is a copyright holder who authorizes use under this
-License of the Program or a work on which the Program is based.  The
-work thus licensed is called the contributor's "contributor version".
-
-  A contributor's "essential patent claims" are all patent claims
-owned or controlled by the contributor, whether already acquired or
-hereafter acquired, that would be infringed by some manner, permitted
-by this License, of making, using, or selling its contributor version,
-but do not include claims that would be infringed only as a
-consequence of further modification of the contributor version.  For
-purposes of this definition, "control" includes the right to grant
-patent sublicenses in a manner consistent with the requirements of
-this License.
-
-  Each contributor grants you a non-exclusive, worldwide, royalty-free
-patent license under the contributor's essential patent claims, to
-make, use, sell, offer for sale, import and otherwise run, modify and
-propagate the contents of its contributor version.
-
-  In the following three paragraphs, a "patent license" is any express
-agreement or commitment, however denominated, not to enforce a patent
-(such as an express permission to practice a patent or covenant not to
-sue for patent infringement).  To "grant" such a patent license to a
-party means to make such an agreement or commitment not to enforce a
-patent against the party.
-
-  If you convey a covered work, knowingly relying on a patent license,
-and the Corresponding Source of the work is not available for anyone
-to copy, free of charge and under the terms of this License, through a
-publicly available network server or other readily accessible means,
-then you must either (1) cause the Corresponding Source to be so
-available, or (2) arrange to deprive yourself of the benefit of the
-patent license for this particular work, or (3) arrange, in a manner
-consistent with the requirements of this License, to extend the patent
-license to downstream recipients.  "Knowingly relying" means you have
-actual knowledge that, but for the patent license, your conveying the
-covered work in a country, or your recipient's use of the covered work
-in a country, would infringe one or more identifiable patents in that
-country that you have reason to believe are valid.
-
-  If, pursuant to or in connection with a single transaction or
-arrangement, you convey, or propagate by procuring conveyance of, a
-covered work, and grant a patent license to some of the parties
-receiving the covered work authorizing them to use, propagate, modify
-or convey a specific copy of the covered work, then the patent license
-you grant is automatically extended to all recipients of the covered
-work and works based on it.
-
-  A patent license is "discriminatory" if it does not include within
-the scope of its coverage, prohibits the exercise of, or is
-conditioned on the non-exercise of one or more of the rights that are
-specifically granted under this License.  You may not convey a covered
-work if you are a party to an arrangement with a third party that is
-in the business of distributing software, under which you make payment
-to the third party based on the extent of your activity of conveying
-the work, and under which the third party grants, to any of the
-parties who would receive the covered work from you, a discriminatory
-patent license (a) in connection with copies of the covered work
-conveyed by you (or copies made from those copies), or (b) primarily
-for and in connection with specific products or compilations that
-contain the covered work, unless you entered into that arrangement,
-or that patent license was granted, prior to 28 March 2007.
-
-  Nothing in this License shall be construed as excluding or limiting
-any implied license or other defenses to infringement that may
-otherwise be available to you under applicable patent law.
-
-  12. No Surrender of Others' Freedom.
-
-  If conditions are imposed on you (whether by court order, agreement or
-otherwise) that contradict the conditions of this License, they do not
-excuse you from the conditions of this License.  If you cannot convey a
-covered work so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you may
-not convey it at all.  For example, if you agree to terms that obligate you
-to collect a royalty for further conveying from those to whom you convey
-the Program, the only way you could satisfy both those terms and this
-License would be to refrain entirely from conveying the Program.
-
-  13. Use with the GNU Affero General Public License.
-
-  Notwithstanding any other provision of this License, you have
-permission to link or combine any covered work with a work licensed
-under version 3 of the GNU Affero General Public License into a single
-combined work, and to convey the resulting work.  The terms of this
-License will continue to apply to the part which is the covered work,
-but the special requirements of the GNU Affero General Public License,
-section 13, concerning interaction through a network will apply to the
-combination as such.
-
-  14. Revised Versions of this License.
-
-  The Free Software Foundation may publish revised and/or new versions of
-the GNU General Public License from time to time.  Such new versions will
-be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
-
-  Each version is given a distinguishing version number.  If the
-Program specifies that a certain numbered version of the GNU General
-Public License "or any later version" applies to it, you have the
-option of following the terms and conditions either of that numbered
-version or of any later version published by the Free Software
-Foundation.  If the Program does not specify a version number of the
-GNU General Public License, you may choose any version ever published
-by the Free Software Foundation.
-
-  If the Program specifies that a proxy can decide which future
-versions of the GNU General Public License can be used, that proxy's
-public statement of acceptance of a version permanently authorizes you
-to choose that version for the Program.
-
-  Later license versions may give you additional or different
-permissions.  However, no additional obligations are imposed on any
-author or copyright holder as a result of your choosing to follow a
-later version.
-
-  15. Disclaimer of Warranty.
-
-  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
-APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
-HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
-OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
-THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
-IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
-ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-
-  16. Limitation of Liability.
-
-  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
-
-  17. Interpretation of Sections 15 and 16.
-
-  If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-  If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
-    <program>  Copyright (C) <year>  <name of author>
-    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<http://www.gnu.org/licenses/>.
-
-  The GNU General Public License does not permit incorporating your program
-into proprietary programs.  If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.  But first, please read
-<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/COPYING.LESSER b/COPYING.LESSER
deleted file mode 100644
--- a/COPYING.LESSER
+++ /dev/null
@@ -1,165 +0,0 @@
-		   GNU LESSER GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
-
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
-
-  This version of the GNU Lesser General Public License incorporates
-the terms and conditions of version 3 of the GNU General Public
-License, supplemented by the additional permissions listed below.
-
-  0. Additional Definitions. 
-
-  As used herein, "this License" refers to version 3 of the GNU Lesser
-General Public License, and the "GNU GPL" refers to version 3 of the GNU
-General Public License.
-
-  "The Library" refers to a covered work governed by this License,
-other than an Application or a Combined Work as defined below.
-
-  An "Application" is any work that makes use of an interface provided
-by the Library, but which is not otherwise based on the Library.
-Defining a subclass of a class defined by the Library is deemed a mode
-of using an interface provided by the Library.
-
-  A "Combined Work" is a work produced by combining or linking an
-Application with the Library.  The particular version of the Library
-with which the Combined Work was made is also called the "Linked
-Version".
-
-  The "Minimal Corresponding Source" for a Combined Work means the
-Corresponding Source for the Combined Work, excluding any source code
-for portions of the Combined Work that, considered in isolation, are
-based on the Application, and not on the Linked Version.
-
-  The "Corresponding Application Code" for a Combined Work means the
-object code and/or source code for the Application, including any data
-and utility programs needed for reproducing the Combined Work from the
-Application, but excluding the System Libraries of the Combined Work.
-
-  1. Exception to Section 3 of the GNU GPL.
-
-  You may convey a covered work under sections 3 and 4 of this License
-without being bound by section 3 of the GNU GPL.
-
-  2. Conveying Modified Versions.
-
-  If you modify a copy of the Library, and, in your modifications, a
-facility refers to a function or data to be supplied by an Application
-that uses the facility (other than as an argument passed when the
-facility is invoked), then you may convey a copy of the modified
-version:
-
-   a) under this License, provided that you make a good faith effort to
-   ensure that, in the event an Application does not supply the
-   function or data, the facility still operates, and performs
-   whatever part of its purpose remains meaningful, or
-
-   b) under the GNU GPL, with none of the additional permissions of
-   this License applicable to that copy.
-
-  3. Object Code Incorporating Material from Library Header Files.
-
-  The object code form of an Application may incorporate material from
-a header file that is part of the Library.  You may convey such object
-code under terms of your choice, provided that, if the incorporated
-material is not limited to numerical parameters, data structure
-layouts and accessors, or small macros, inline functions and templates
-(ten or fewer lines in length), you do both of the following:
-
-   a) Give prominent notice with each copy of the object code that the
-   Library is used in it and that the Library and its use are
-   covered by this License.
-
-   b) Accompany the object code with a copy of the GNU GPL and this license
-   document.
-
-  4. Combined Works.
-
-  You may convey a Combined Work under terms of your choice that,
-taken together, effectively do not restrict modification of the
-portions of the Library contained in the Combined Work and reverse
-engineering for debugging such modifications, if you also do each of
-the following:
-
-   a) Give prominent notice with each copy of the Combined Work that
-   the Library is used in it and that the Library and its use are
-   covered by this License.
-
-   b) Accompany the Combined Work with a copy of the GNU GPL and this license
-   document.
-
-   c) For a Combined Work that displays copyright notices during
-   execution, include the copyright notice for the Library among
-   these notices, as well as a reference directing the user to the
-   copies of the GNU GPL and this license document.
-
-   d) Do one of the following:
-
-       0) Convey the Minimal Corresponding Source under the terms of this
-       License, and the Corresponding Application Code in a form
-       suitable for, and under terms that permit, the user to
-       recombine or relink the Application with a modified version of
-       the Linked Version to produce a modified Combined Work, in the
-       manner specified by section 6 of the GNU GPL for conveying
-       Corresponding Source.
-
-       1) Use a suitable shared library mechanism for linking with the
-       Library.  A suitable mechanism is one that (a) uses at run time
-       a copy of the Library already present on the user's computer
-       system, and (b) will operate properly with a modified version
-       of the Library that is interface-compatible with the Linked
-       Version. 
-
-   e) Provide Installation Information, but only if you would otherwise
-   be required to provide such information under section 6 of the
-   GNU GPL, and only to the extent that such information is
-   necessary to install and execute a modified version of the
-   Combined Work produced by recombining or relinking the
-   Application with a modified version of the Linked Version. (If
-   you use option 4d0, the Installation Information must accompany
-   the Minimal Corresponding Source and Corresponding Application
-   Code. If you use option 4d1, you must provide the Installation
-   Information in the manner specified by section 6 of the GNU GPL
-   for conveying Corresponding Source.)
-
-  5. Combined Libraries.
-
-  You may place library facilities that are a work based on the
-Library side by side in a single library together with other library
-facilities that are not Applications and are not covered by this
-License, and convey such a combined library under terms of your
-choice, if you do both of the following:
-
-   a) Accompany the combined library with a copy of the same work based
-   on the Library, uncombined with any other library facilities,
-   conveyed under the terms of this License.
-
-   b) Give prominent notice with the combined library that part of it
-   is a work based on the Library, and explaining where to find the
-   accompanying uncombined form of the same work.
-
-  6. Revised Versions of the GNU Lesser General Public License.
-
-  The Free Software Foundation may publish revised and/or new versions
-of the GNU Lesser General Public License from time to time. Such new
-versions will be similar in spirit to the present version, but may
-differ in detail to address new problems or concerns.
-
-  Each version is given a distinguishing version number. If the
-Library as you received it specifies that a certain numbered version
-of the GNU Lesser General Public License "or any later version"
-applies to it, you have the option of following the terms and
-conditions either of that published version or of any later version
-published by the Free Software Foundation. If the Library as you
-received it does not specify a version number of the GNU Lesser
-General Public License, you may choose any version of the GNU Lesser
-General Public License ever published by the Free Software Foundation.
-
-  If the Library as you received it specifies that a proxy can decide
-whether future versions of the GNU Lesser General Public License shall
-apply, that proxy's public statement of acceptance of any version is
-permanent authorization for you to choose that version for the
-Library.
diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,27 @@
+Copyright (c) 2007, Magnus Therning
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    - Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+    - Redistributions in binary form must reproduce the above copyright notice,
+      this list of conditions and the following disclaimer in the documentation
+      and/or other materials provided with the distribution.
+
+    - Neither the name of the <ORGANIZATION> nor the names of its contributors
+      may be used to endorse or promote products derived from this software
+      without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/QC.hs b/QC.hs
--- a/QC.hs
+++ b/QC.hs
@@ -1,19 +1,6 @@
-{- Copyright © 2007 Magnus Therning
- -
- - This file is part of dataenc.
- -
- - Dataenc is free software: you can redistribute it and/or modify it under
- - the terms of the GNU Lesser General Public License as published by the
- - Free Software Foundation, either version 3 of the License, or (at your
- - option) any later version.
- -
- - Dataenc is distributed in the hope that it will be useful, but WITHOUT
- - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- - FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
- - License for more details.
- -
- - You should have received a copy of the GNU Lesser General Public License
- - along with dataenc.  If not, see <http://www.gnu.org/licenses/>
+{-
+ - Copyright : (c) 2007 Magnus Therning
+ - License   : BSD3
  -}
 
 module Main
@@ -30,6 +17,7 @@
 import qualified Codec.Binary.Base32 as Base32
 import qualified Codec.Binary.Base32Hex as Base32Hex
 import qualified Codec.Binary.Base16 as Base16
+import qualified Codec.Binary.Yenc as Yenc
 
 -- {{{1 Arbitrary instances
 instance Arbitrary Char where
@@ -98,6 +86,13 @@
 prop_base16Chop s = s == (Base16.unchop $ Base16.chop 6 s)
     where types = s::String
 
+-- {{{1 yEncoding
+prop_yencEncode ws = ws == (fromJust $ Yenc.decode $ Yenc.encode ws)
+    where types = ws ::[Word8]
+
+prop_yencChop ws = ws == (Yenc.unchop $ Yenc.chop 6 ws)
+    where types = ws :: [Word8]
+
 -- {{{1 main
 main = do
     quickCheck prop_uuEncode
@@ -115,3 +110,5 @@
     quickCheck prop_base32HexChop
     quickCheck prop_base16Encode
     quickCheck prop_base16Chop
+    quickCheck prop_yencEncode
+    quickCheck prop_yencChop
diff --git a/UT.hs b/UT.hs
--- a/UT.hs
+++ b/UT.hs
@@ -1,19 +1,6 @@
-{- Copyright © 2007 Magnus Therning
- -
- - This file is part of dataenc.
- -
- - Dataenc is free software: you can redistribute it and/or modify it under
- - the terms of the GNU Lesser General Public License as published by the
- - Free Software Foundation, either version 3 of the License, or (at your
- - option) any later version.
- -
- - Dataenc is distributed in the hope that it will be useful, but WITHOUT
- - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- - FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
- - License for more details.
- -
- - You should have received a copy of the GNU Lesser General Public License
- - along with dataenc.  If not, see <http://www.gnu.org/licenses/>
+{-
+ - Copyright : (c) 2007 Magnus Therning
+ - License   : BSD3
  -}
 
 module Main
@@ -25,6 +12,7 @@
 import Data.Maybe
 
 import Codec.Binary.DataEncoding
+import qualified Codec.Binary.Yenc as Yenc
 
 -- {{{1 buildTestList
 -- builds a list of successful tests based on a tuple (suite, description,
@@ -165,6 +153,21 @@
     , "base16 decode' illegal" ~: [Nothing] ~=? decode' base16 "GH"
     ]
 
+-- {{{1 yEncoding
+yencTests = test
+    [ "yEnc encode empty" ~: [] ~=? Yenc.encode []
+    , "yEnc decode empty" ~: Just [] ~=? Yenc.decode []
+    , "yEnc encode 'f'" ~: [0x90] ~=? Yenc.encode [0x66]
+    , "yEnc decode enc('f')" ~: Just [0x66] ~=? Yenc.decode [0x90]
+    , "yEnc encode 'foobar'" ~: [0x90, 0x99, 0x99, 0x8c, 0x8b, 0x9c] ~=? Yenc.encode [0x66, 0x6f, 0x6f, 0x62, 0x61, 0x72]
+    , "yEnc decode enc('foobar')" ~: Just [0x66, 0x6f, 0x6f, 0x62, 0x61, 0x72] ~=? Yenc.decode [0x90, 0x99, 0x99, 0x8c, 0x8b, 0x9c]
+    , "yEnc encode [0xd6, 0xd7]" ~: [0x3d, 0x40, 0x01] ~=? Yenc.encode [0xd6, 0xd7]
+    , "yEnc decode enc([0xd6, 0xd7])" ~:  Just [0xd6, 0xd7] ~=? Yenc.decode [0x3d, 0x40, 0x01]
+    , "yEnc encode criticals" ~: [0x3d, 0x40, 0x3d, 0x4a, 0x3d, 0x4d, 0x3d, 0x7d] ~=? Yenc.encode [0xd6, 0xe0, 0xe3, 0x13]
+    , "yEnc decode criticals" ~:  Just [0xd6, 0xe0, 0xe3, 0x13] ~=? Yenc.decode [0x3d, 0x40, 0x3d, 0x4a, 0x3d, 0x4d, 0x3d, 0x7d]
+    , "yEnc chop" ~: [[0x3d, 0x40], [0x01, 0x3d, 0x4a]] ~=? Yenc.chop 2 [0x3d, 0x40, 0x01, 0x3d, 0x4a]
+    ]
+
 -- {{{1 test list and main
 testList = TestList
     [ uuTests, uuTests2, uuTestsFail
@@ -173,7 +176,9 @@
     , base64UrlTests
     , base32Tests, base32TestsFail
     , base32HexTests, base32HexTestsFail
-    , base16Tests,  base16TestsFail ]
+    , base16Tests,  base16TestsFail
+    , yencTests
+    ]
 
 main :: IO ()
 main = do
diff --git a/dataenc.cabal b/dataenc.cabal
--- a/dataenc.cabal
+++ b/dataenc.cabal
@@ -1,7 +1,7 @@
 name: dataenc
-version: 0.11.1
-license: LGPL
-license-file: COPYING.LESSER
+version: 0.12
+license: BSD3
+license-file: LICENSE
 cabal-version: >= 1.2
 build-type: Simple
 author: Magnus Therning
@@ -11,8 +11,8 @@
 category: Codec
 synopsis: Data encoding library
 description: Data encoding library currently providing Uuencode, Base64,
-        Base64Url, Base32, Base32Hex, Base16, and Base85.
-extra-source-files: UT.hs QC.hs COPYING
+        Base64Url, Base32, Base32Hex, Base16, Base85, and yEncoding.
+extra-source-files: UT.hs QC.hs
 
 flag large_base
         description: Choose the old larger, monolithic base package.
@@ -33,3 +33,4 @@
                 Codec.Binary.Base64Url
                 Codec.Binary.Base64
                 Codec.Binary.Base85
+                Codec.Binary.Yenc
diff --git a/src/Codec/Binary/Base16.hs b/src/Codec/Binary/Base16.hs
--- a/src/Codec/Binary/Base16.hs
+++ b/src/Codec/Binary/Base16.hs
@@ -1,28 +1,12 @@
-{- Copyright © 2007 Magnus Therning
- -
- - This file is part of dataenc.
- -
- - Dataenc is free software: you can redistribute it and/or modify it under
- - the terms of the GNU Lesser General Public License as published by the
- - Free Software Foundation, either version 3 of the License, or (at your
- - option) any later version.
- -
- - Dataenc is distributed in the hope that it will be useful, but WITHOUT
- - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- - FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
- - License for more details.
- -
- - You should have received a copy of the GNU Lesser General Public License
- - along with dataenc.  If not, see <http://www.gnu.org/licenses/>
- -}
-
--- | Base16 module.
+-- |
+-- Module    : Codec.Binary.Base16
+-- Copyright : (c) 2007 Magnus Therning
+-- License   : BSD3
 --
---   Implemented as specified in RFC 4648
---   (<http://tools.ietf.org/html/rfc4648>).
+-- Implemented as specified in RFC 4648 (<http://tools.ietf.org/html/rfc4648>).
 --
---   Further documentation and information can be found at
---   <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
+-- Further documentation and information can be found at
+-- <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
 module Codec.Binary.Base16
     ( encode
     , decode
diff --git a/src/Codec/Binary/Base32.hs b/src/Codec/Binary/Base32.hs
--- a/src/Codec/Binary/Base32.hs
+++ b/src/Codec/Binary/Base32.hs
@@ -1,28 +1,13 @@
-{- Copyright © 2007 Magnus Therning
- -
- - This file is part of dataenc.
- -
- - Dataenc is free software: you can redistribute it and/or modify it under
- - the terms of the GNU Lesser General Public License as published by the
- - Free Software Foundation, either version 3 of the License, or (at your
- - option) any later version.
- -
- - Dataenc is distributed in the hope that it will be useful, but WITHOUT
- - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- - FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
- - License for more details.
- -
- - You should have received a copy of the GNU Lesser General Public License
- - along with dataenc.  If not, see <http://www.gnu.org/licenses/>
- -}
-
--- | Base32 module.
+-- |
+-- Module    : Codec.Binary.Base32
+-- Copyright : (c) 2007 Magnus Therning
+-- License   : BSD3
 --
---   Implemented as specified in RFC 4648
---   (<http://tools.ietf.org/html/rfc4648>).
+-- Implemented as specified in RFC 4648
+-- (<http://tools.ietf.org/html/rfc4648>).
 --
---   Further documentation and information can be found at
---   <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
+-- Further documentation and information can be found at
+-- <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
 module Codec.Binary.Base32
     ( encode
     , decode
diff --git a/src/Codec/Binary/Base32Hex.hs b/src/Codec/Binary/Base32Hex.hs
--- a/src/Codec/Binary/Base32Hex.hs
+++ b/src/Codec/Binary/Base32Hex.hs
@@ -1,28 +1,13 @@
-{- Copyright © 2007 Magnus Therning
- -
- - This file is part of dataenc.
- -
- - Dataenc is free software: you can redistribute it and/or modify it under
- - the terms of the GNU Lesser General Public License as published by the
- - Free Software Foundation, either version 3 of the License, or (at your
- - option) any later version.
- -
- - Dataenc is distributed in the hope that it will be useful, but WITHOUT
- - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- - FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
- - License for more details.
- -
- - You should have received a copy of the GNU Lesser General Public License
- - along with dataenc.  If not, see <http://www.gnu.org/licenses/>
- -}
-
--- | Base32Hex module.
+-- |
+-- Module    : Codec.Binary.Base32Hex
+-- Copyright : (c) 2007 Magnus Therning
+-- License   : BSD3
 --
---   Implemented as specified in RFC 4648
---   (<http://tools.ietf.org/html/rfc4648>).
+-- Implemented as specified in RFC 4648
+-- (<http://tools.ietf.org/html/rfc4648>).
 --
---   Further documentation and information can be found at
---   <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
+-- Further documentation and information can be found at
+-- <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
 module Codec.Binary.Base32Hex
     ( encode
     , decode
diff --git a/src/Codec/Binary/Base64.hs b/src/Codec/Binary/Base64.hs
--- a/src/Codec/Binary/Base64.hs
+++ b/src/Codec/Binary/Base64.hs
@@ -1,28 +1,13 @@
-{- Copyright © 2007 Magnus Therning
- -
- - This file is part of dataenc.
- -
- - Dataenc is free software: you can redistribute it and/or modify it under
- - the terms of the GNU Lesser General Public License as published by the
- - Free Software Foundation, either version 3 of the License, or (at your
- - option) any later version.
- -
- - Dataenc is distributed in the hope that it will be useful, but WITHOUT
- - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- - FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
- - License for more details.
- -
- - You should have received a copy of the GNU Lesser General Public License
- - along with dataenc.  If not, see <http://www.gnu.org/licenses/>
- -}
-
--- | Base64 module.
+-- |
+-- Module    : Codec.Binary.Base64
+-- Copyright : (c) 2007 Magnus Therning
+-- License   : BSD3
 --
---   Implemented as specified in RFC 4648
---   (<http://tools.ietf.org/html/rfc4648>).
+-- Implemented as specified in RFC 4648
+-- (<http://tools.ietf.org/html/rfc4648>).
 --
---   Further documentation and information can be found at
---   <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
+-- Further documentation and information can be found at
+-- <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
 module Codec.Binary.Base64
     ( encode
     , decode
diff --git a/src/Codec/Binary/Base64Url.hs b/src/Codec/Binary/Base64Url.hs
--- a/src/Codec/Binary/Base64Url.hs
+++ b/src/Codec/Binary/Base64Url.hs
@@ -1,28 +1,12 @@
-{- Copyright © 2007 Magnus Therning
- -
- - This file is part of dataenc.
- -
- - Dataenc is free software: you can redistribute it and/or modify it under
- - the terms of the GNU Lesser General Public License as published by the
- - Free Software Foundation, either version 3 of the License, or (at your
- - option) any later version.
- -
- - Dataenc is distributed in the hope that it will be useful, but WITHOUT
- - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- - FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
- - License for more details.
- -
- - You should have received a copy of the GNU Lesser General Public License
- - along with dataenc.  If not, see <http://www.gnu.org/licenses/>
- -}
-
--- | Base64Url module.
+-- |
+-- Module    : Codec.Binary.Base64Url
+-- Copyright : (c) 2007 Magnus Therning
+-- License   : BSD3
 --
---   Implemented as specified in RFC 4648
---   (<http://tools.ietf.org/html/rfc4648>).
+-- Implemented as specified in RFC 4648 (<http://tools.ietf.org/html/rfc4648>).
 --
---   Further documentation and information can be found at
---   <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
+-- Further documentation and information can be found at
+-- <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
 module Codec.Binary.Base64Url
     ( encode
     , decode
diff --git a/src/Codec/Binary/Base85.hs b/src/Codec/Binary/Base85.hs
--- a/src/Codec/Binary/Base85.hs
+++ b/src/Codec/Binary/Base85.hs
@@ -1,27 +1,12 @@
-{- Copyright © 2008 Magnus Therning
- -
- - This file is part of dataenc.
- -
- - Dataenc is free software: you can redistribute it and/or modify it under
- - the terms of the GNU Lesser General Public License as published by the
- - Free Software Foundation, either version 3 of the License, or (at your
- - option) any later version.
- -
- - Dataenc is distributed in the hope that it will be useful, but WITHOUT
- - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- - FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
- - License for more details.
- -
- - You should have received a copy of the GNU Lesser General Public License
- - along with dataenc.  If not, see <http://www.gnu.org/licenses/>
- -}
-
--- | Base85 module.
+-- |
+-- Module    : Codec.Binary.Base85
+-- Copyright : (c) 2007 Magnus Therning
+-- License   : BSD3
 --
---   Implemented as described at <http://en.wikipedia.org/wiki/Ascii85>.
+-- Implemented as described at <http://en.wikipedia.org/wiki/Ascii85>.
 --
---   Further documentation and information can be found at
---   <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
+-- Further documentation and information can be found at
+-- <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
 module Codec.Binary.Base85
     ( encode
     , decode
diff --git a/src/Codec/Binary/DataEncoding.hs b/src/Codec/Binary/DataEncoding.hs
--- a/src/Codec/Binary/DataEncoding.hs
+++ b/src/Codec/Binary/DataEncoding.hs
@@ -1,29 +1,14 @@
-{- Copyright © 2007 Magnus Therning
- -
- - This file is part of dataenc.
- -
- - Dataenc is free software: you can redistribute it and/or modify it under
- - the terms of the GNU Lesser General Public License as published by the
- - Free Software Foundation, either version 3 of the License, or (at your
- - option) any later version.
- -
- - Dataenc is distributed in the hope that it will be useful, but WITHOUT
- - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- - FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
- - License for more details.
- -
- - You should have received a copy of the GNU Lesser General Public License
- - along with dataenc.  If not, see <http://www.gnu.org/licenses/>
- -}
-
--- | Data encoding module.
+-- |
+-- Module    : Codec.Binary.DataEncoding
+-- Copyright : (c) 2007 Magnus Therning
+-- License   : BSD3
 --
---   It exposes several instances of 'DataCodec', one for each data encoding
---   implemented in the library without causing the name clashing that would
---   result from importing the individual encoding modules.
+-- This module exposes several instances of 'DataCodec', one for each data
+-- encoding implemented in the library without causing the name clashing that
+-- would result from importing the individual encoding modules.
 --
---   Further documentation and information can be found at
---   <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
+-- Further documentation and information can be found at
+-- <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
 module Codec.Binary.DataEncoding
     ( DataCodec
     , encode
diff --git a/src/Codec/Binary/Uu.hs b/src/Codec/Binary/Uu.hs
--- a/src/Codec/Binary/Uu.hs
+++ b/src/Codec/Binary/Uu.hs
@@ -1,29 +1,14 @@
-{- Copyright © 2007 Magnus Therning
- -
- - This file is part of dataenc.
- -
- - Dataenc is free software: you can redistribute it and/or modify it under
- - the terms of the GNU Lesser General Public License as published by the
- - Free Software Foundation, either version 3 of the License, or (at your
- - option) any later version.
- -
- - Dataenc is distributed in the hope that it will be useful, but WITHOUT
- - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- - FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
- - License for more details.
- -
- - You should have received a copy of the GNU Lesser General Public License
- - along with dataenc.  If not, see <http://www.gnu.org/licenses/>
- -}
-
--- | Uuencoding module.
+-- |
+-- Module    : Codec.Binary.Uu
+-- Copyright : (c) 2007 Magnus Therning
+-- License   : BSD3
 --
---   Uuencoding is notoriously badly specified.  This implementation is
---   compatible with the GNU Sharutils
---   (<http://www.gnu.org/software/sharutils/>).
+-- Uuencoding is notoriously badly specified.  This implementation is
+-- compatible with the GNU Sharutils
+-- (<http://www.gnu.org/software/sharutils/>).
 --
---   Further documentation and information can be found at
---   <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
+-- Further documentation and information can be found at
+-- <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
 module Codec.Binary.Uu
     ( encode
     , decode
diff --git a/src/Codec/Binary/Yenc.hs b/src/Codec/Binary/Yenc.hs
new file mode 100644
--- /dev/null
+++ b/src/Codec/Binary/Yenc.hs
@@ -0,0 +1,63 @@
+-- |
+-- Module    : Codec.Binary.Yenc
+-- Copyright : (c) 2007 Magnus Therning
+-- License   : BSD3
+--
+-- Implementation based on the specification found at
+-- <http://yence.sourceforge.net/docs/protocol/version1_3_draft.html>.
+--
+-- Further documentation and information can be found at
+-- <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
+module Codec.Binary.Yenc
+    ( encode
+    , decode
+    , decode'
+    , chop
+    , unchop
+    ) where
+
+import Data.Word
+
+_criticals_in = [0xd6, 0xe0, 0xe3, 0x13]
+_equal = 0x3d
+
+-- {{{1 encode
+-- | Encode data.
+encode :: [Word8]
+    -> [Word8]
+encode (d:ds)
+    | d `elem` _criticals_in = _equal : d + 106 : encode ds
+    | otherwise = d + 42 : encode ds
+encode _ = []
+
+-- {{{1 decode
+-- | Decode data (lazy).
+decode' :: [Word8]
+    -> [Maybe Word8]
+decode' (0x3d:d:ds) = Just (d + 150) : decode' ds
+decode' (d:ds) = Just (d + 214) : decode' ds
+decode' _ = []
+
+-- | Decode data (strict).
+decode :: [Word8]
+    -> Maybe [Word8]
+decode = sequence . decode'
+
+-- {{{1 chop
+-- | Chop up a string in parts.
+chop :: Int     -- ^ length of individual lines
+    -> [Word8]
+    -> [[Word8]]
+chop _ [] = []
+chop n ws = let
+        (p1, p2) = splitAt n ws
+    in
+        if (last p1 == _equal)
+            then (p1 ++ (take 1 p2)) : chop n (drop 1 p2)
+            else p1 : chop n p2
+
+-- {{{1 unchop
+-- | Concatenate the strings into one long string.
+unchop :: [[Word8]]
+    -> [Word8]
+unchop = concat
