Provide two more custom listing styles
Add templates I forgot to include
Listings can now be filtered by tag
Add required migration
Merge branch 'feature/tags_for_listings' into develop
Pin older south, fix Django 1.4 migration compatibility
Prep for release
Merge branch 'release/1.1.20' into develop
Content type, categories and tags fields on listings are now ANDed when evaluating the listing
Do not allow comments containing only spaces
Prep for release
Merge branch 'release/1.1.21' into develop
Fix bug where it was possible for an event handler to change the default avatar during user registration
Cache individual listing item templates
Disable caching in development mode
Clean up base template
Prep for release
Merge branch 'release/1.1.22' into develop
Fix typo
Prep for release