Room filtering

Several small changes to the lobby room list to:

- [x] address #806 
- [x] address #787
- [x] add empty list text
- [x] filter 'your private rooms' list
- [x] remove jquery livesearch
- [x] make closed private rooms showable
- [ ] make "Load more" less goofy when you have a filter (it might 'load' 100 new rooms but show none)
- [x] fix minor preexisting issues with ie9 and the icons (readonly / locked) not showing
- [ ] ensure that room creation / locking / update etc actually updates the various lists

What it looks like now (when no rooms match):
![jabbr-rooms-filter](https://f.cloud.github.com/assets/1271535/379087/476d03e2-a581-11e2-9bb5-e61e889fd0d0.png)