Changelog for gray-code-0.3
- 0.3: use only total functions on `FiniteBits`, requires GHC >= 7.8
- 0.2.2: build on GHC 7.6, integrate tests with cabal build
- 0.2.1: `toList'` function
- 0.2: split `C.B.G.Bits` and `C.B.G.List` APIs
- 0.1: initial Hackage release