Optimizations. Added missing dep. Cached rank in the db. New notification callback hook. RSS feeds. CSS and template fixes. JSON API. Limit relative leaderboard. Emit fedmsg messages. Misc bugfixes. Users can opt out. Websockets on the frontpage. More facelifting. More cosmetic surgery. Facelift marathon. Massive facelift. Use forward compat sqlalchemy. Reorganize avatars around openid. Improvements to the explore view. CSS and JSON API enhancements. Lots of bugfixes and enhancements.