Merge branch 'release/0.4.0' into develop
see a every badge => see every badge
Use cached db rank for leaderboard views.
Optimize the frontpage to not query the entire db.  Fixes #187.
Add link tags for badge and user to json and rss.

Fixes #208.
Space after the %.
Merge pull request #213 from fedora-infra/feature/link-tags

Add link tags for badge and user to json and rss.
Merge pull request #212 from fedora-infra/feature/optimized-frontpage

Optimize the frontpage to not query the entire db.
Avoid n+1 queries.
User page sped up from 6.5 seconds to 0.09 seconds.
Some small optimizations to user/json.
Optimize badge json.
Merge pull request #211 from fedora-infra/feature/use-cached-db-rank

Use cached db rank for leaderboard views.
0.4.1
Merge branch 'release/0.4.1'