Gameday revamp

Turn universal "feedbar" into "matchbar" for each event, shows last match (highlighted with the winning alliance color) followed by the next X matches. Matchbar covers up player controls (play/volume/popout), but slides down out of the way on hover. Matches are pushed via Firebase.

Should provide similar functionality requested in #576 while reducing clutter and maintaining a clean UI. 

Future improvements can include changing the background of future matches a certain color (ex: yellow) for matches of teams the user is following.


![GameDay - The Blue Alliance](https://f.cloud.github.com/assets/1421884/384622/3987f632-a65e-11e2-8946-0cdef63ff84c.png)