void-0.7: CHANGELOG.markdown

0.7
---
* adapt to `Data.Void` being moved into `base-4.8`
* `vacuousM` removed

0.6
---
* `instance Exception Void`
* `instance Generic Void`
* `instance Hashable Void`

0.5.12
------
* Fixed compatibility with GHC 7.2 (#6)
* Added `CHANGELOG.markdown` and `README.markdown`