Fixed a deprecation warning about mimetype=
Updated targets for Django 1.5 / 1.6
Updated urls import
Automatically re-register models from Django's default admin site

Refs #5 and #4 -- this should be less confusing. Thanks @mbrochh for the idea.
Wrap autodiscover instead of creating import-time side effects
Bump to 0.4
Django 1.3 isn't tested, removed from compatibility info
Raise a warning istead of logging.warn when no request is passed
Added Python3 support
Bumped version numbers to 0.5
Updated the travis URLs
Fixed flake8 warnings
Generalize rate limiting for non-standard backends
Add tests for backends without username/password
Require correct username_key for custom backend
Fix broken test and add test for broken backends
Merge pull request #7 from treyhunner/generalize-backend

Generalize rate limiting for backend without username
Updated docs and release number for 0.6
Update versions for travis
Url for Simon's blog on ratelimitcache has changed.