Fix for team menu not being populated when loading an existing bracket

- Teams collection now fires a sync command when the bracket is being parsed
- Team menu calls render when a sync occurs on its collection
Unknown teams now save themselves as TBD instead of empty string

- Teams with the name "TBD" are now rendered as empty string
- Fixed bug where setting a team to TBD in a seed match would cause a nil pointer exception
Display related fixes for teams

- Match welder should now create teams named "TBD" instead of empty string
- Re-added reset listener to team menu
Upgraded underscore to 1.4.4

-Updated underscore to 1.4.4 to take advantage of the findWhere utility method
-Added sc2 as default group to each new event
Merge pull request #6 from K4orta/underscore-upgrade

Team Menu Fixes and Underscore Upgrade