Use raw_id_fields for users and snippets.
Merge pull request #2 from zerok/feature/raw_id_fields

Use raw_id_fields for users and snippets.
Add CAB_VERSIONS to test settings as fixture.
Allow users to remove their own votes.
Use newer django-simple-ratings to fix backward compat issue with hashlib.
Use url tag for reset-rating link.
Merge pull request #6 from zerok/feature/unrate

Allow users to remove their own votes.
Update .travis.yml according to userguide.
Remove no-longer used test requirement