Add reversion-compare and reversion templates.
fix recover icon.
add `submit-row` class to action buttons for js compatible. (for `django-fiber`)
empty
`django-mptt` template admin comatible.
Merge pull request #10 from pahaz/master

Add `reversion-compare` and `reversion` templates.
updated docs
Merge branch 'master' into django1.5

Conflicts:
	docs/usage.rst
fix collapsible icon