User list is now stored on redis.

Beginning to move a bunch of stuff over to redis so that Synctron can be scaled out to run multiple processes at once.
Ported rooms over to use redis for message passing.
Room lists on the homepage now work across multiple processes.
Removed testing crap from run.py

I told myself I would remember to remove it and promptly forgot about it.
Fixed a crash in emit_video_changed
Fixed removing videos from the playlist.
Added redis to dotcloud config.