Move the playhead on audio playback
Clean up comment display
Refactor icon display for comments
Format timestamps
Restore icons
Move playhead control to tracks.js
Remove AtWho from textare
More comment display and validation
Restore user avatars
Remove unload event on audio playback
Adding ratings support
Making UUID the default for to_param
Adding byline links on comments
Cleanup
Nuclear
Add comment relationship
Add initial reputation calculation (with resque jobs)
Remove redundant columns from user table
Add rating observer
Removing waveform type selector