Begin changes to support proxy models.
Proxy model support by following concrete model
update README.rst for desription of fork.
Update README.rst
Update setup.py
Merge https://github.com/AgDude/django-reversion
Merge remote-tracking branch 'remotes/upstream/master'

Conflicts:
	src/reversion/admin.py
	src/reversion/revisions.py
Add registration test
Add proxy model tests
Fix broken merge
Merge pull request #363 from bourivouh/master

Proxy model support