hood-0.3: CHANGELOG.md

## 0.3
* `Observable` instances can be derived for `Generic` instances using
  `DefaultSignatures` ([MaartenFaddegon](https://github.com/ku-fpg/hood/pull/1))
* Depend on the `FPretty` library for pretty-printing, which requires
  `base-4.5` or greater.

## 0.2.1
* Fixed build with GHC 7.10