Subgame: Bug fix for round changing

There were a potential infinite loop problem if the intro or outro
called nextRound.
Birdhero: Bugfix for agent thought
Birdhero: Agent interaction
Subgame: Bugfix for removeEvent
Birdhero: Music independent of starting mode
Agent: Slight fistpump change
Birdhero: Agent eyes in outro
Updated Phaser and TweenMax libraries
Merge remote-tracking branch 'upstream/master'