diff --git a/.ghci b/.ghci
new file mode 100644
--- /dev/null
+++ b/.ghci
@@ -0,0 +1,1 @@
+:set -isrc -idist/build/autogen -optP-include -optPdist/build/autogen/cabal_macros.h
diff --git a/.gitignore b/.gitignore
new file mode 100644
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,13 @@
+dist
+docs
+wiki
+TAGS
+tags
+wip
+.DS_Store
+.*.swp
+.*.swo
+*.o
+*.hi
+*~
+*#
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,8 @@
+language: haskell
+notifications:
+  irc:
+    channels:
+      - "irc.freenode.org#haskell-lens"
+    skip_join: true
+    template:
+      - "\x0313tagged-transformer\x03/\x0306%{branch}\x03 \x0314%{commit}\x03 %{build_url} %{message}"
diff --git a/.vim.custom b/.vim.custom
new file mode 100644
--- /dev/null
+++ b/.vim.custom
@@ -0,0 +1,31 @@
+" Add the following to your .vimrc to automatically load this on startup
+
+" if filereadable(".vim.custom")
+"     so .vim.custom
+" endif
+
+function StripTrailingWhitespace()
+  let myline=line(".")
+  let mycolumn = col(".")
+  silent %s/  *$//
+  call cursor(myline, mycolumn)
+endfunction
+
+" enable syntax highlighting
+syntax on
+
+" search for the tags file anywhere between here and /
+set tags=TAGS;/
+
+" highlight tabs and trailing spaces
+set listchars=tab:‗‗,trail:‗
+set list
+
+" f2 runs hasktags
+map <F2> :exec ":!hasktags -x -c --ignore src"<CR><CR>
+
+" strip trailing whitespace before saving
+" au BufWritePre *.hs,*.markdown silent! cal StripTrailingWhitespace()
+
+" rebuild hasktags after saving
+au BufWritePost *.hs silent! :exec ":!hasktags -x -c --ignore src"
diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
new file mode 100644
--- /dev/null
+++ b/CHANGELOG.markdown
@@ -0,0 +1,3 @@
+0.3.1
+-----
+* Marked the package `Trustworthy`.
diff --git a/README.markdown b/README.markdown
new file mode 100644
--- /dev/null
+++ b/README.markdown
@@ -0,0 +1,4 @@
+tagged-transformer
+==================
+
+Monad transformer carrying an extra [phantom type](http://www.haskell.org/haskellwiki/Phantom_type) tag. 
diff --git a/src/Data/Functor/Trans/Tagged.hs b/src/Data/Functor/Trans/Tagged.hs
--- a/src/Data/Functor/Trans/Tagged.hs
+++ b/src/Data/Functor/Trans/Tagged.hs
@@ -3,6 +3,10 @@
 {-# LANGUAGE Rank2Types #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE UndecidableInstances #-}
+{-# LANGUAGE CPP #-}
+#if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ >= 702
+{-# LANGUAGE Trustworthy #-}
+#endif
 ----------------------------------------------------------------------------
 -- |
 -- Module     : Data.Functor.Trans.Tagged
diff --git a/tagged-transformer.cabal b/tagged-transformer.cabal
--- a/tagged-transformer.cabal
+++ b/tagged-transformer.cabal
@@ -1,5 +1,5 @@
 name:           tagged-transformer
-version:        0.3
+version:        0.3.1
 license:        BSD3
 license-file:   LICENSE
 author:         Edward A. Kmett
@@ -12,6 +12,13 @@
 description:    Provides newtype wrappers for phantom types to avoid unsafely passing dummy arguments
 build-type:     Simple
 cabal-version:  >=1.6
+extra-source-files:
+  .travis.yml
+  .vim.custom
+  .ghci
+  .gitignore
+  CHANGELOG.markdown
+  README.markdown
 
 source-repository head
   type: git