bound-0.5.1: CHANGELOG.markdown

0.5.1
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* Removed my personal inter-package dependency upper bounds
* Updated doctest suite to use exact versions.

0.5
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* Created a `doctest`-based test suite
* Added many examples
* 100% haddock coverage
* Added the `Name` `Comonad`, to help retain names for bound variables.
* Bumped dependencies