v2.0.0
- remove ActiveRecord validation macro, it gets messy to maintain
  support for AR 2.x and 3.x so I opted to keep things simple and
  remove it
- modernise package - clean out the Rakefile, use bundler for load
  path management, etc.

v1.3
- [Dan Cheail] Added an ActiveRecord validation macro, validates_abn_correctness_of

v1.2
- Merged some cleanup and safety patches by Bodaniel Jeanes

v1.1
- Small tweak to add compatability with MRI < 1.8.7

v1.0
- Initial Release
