Django-hats

Change log:
* Improved efficiency of multi-role checks using CBV mixin.
* Bug fix in `migrate_role` to be fully Django 1.9+ compatible.

Change log:
- Added Python 3.5+ compatibility using `six`.
- Updated documentation

Change log:
- Added `post_synchronize_roles` signal for post-processing hook.
- Updated documentation.

Added group caching to reduce database hits in template usage.

Initial release of django-hats! Check out the README for full details.