updated changelog

Author: Philip Champon

CHANGELOG.markdown

@@ -8,6 +8,7 @@ Next Release
 * [#166](https://github.com/intridea/grape/pull/166): Added support for `redirect`, including permanent and temporary - [@allenwei](https://github.com/allenwei).
 * [#159](https://github.com/intridea/grape/pull/159): Added `:requirements` to routes, allowing to use reserved characters in paths - [@gaiottino](https://github.com/gaiottino).
 * [#156](https://github.com/intridea/grape/pull/156): Added support for adding formatters to entities - [@bobbytables](https://github.com/bobbytables).
+* [#183](https://github.com/intridea/grape/pull/183): Added ability to include documentation in entities - [@flah00](https://github.com/flah00)
 
 0.2.0 (3/28/2012)
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