Added randomization to swarmers and adjusted the values. 20% of swarmers that spawn are 'Elite' swarmers and will have double the turn rate of a normal swarmer (attacks the player more directly more often).
Fixed pink astroids and updated debris spawner.
Updated a few other prefabs, player shots are now green and enemy swarmers shoot red.
Merge branch 'master' of https://github.com/IGS2-Spring14/TubeRacer