Added some boss battle stuff, along with some transitions.
Monster commit with all of the L4 stuff for master.
Had mrge conflict to fix.
Made some changes to the ship prefabs so they did not look weird in the perspective view.  Also added the turret.
Made some modifications to the turret, and added explosive platforms to L3.  Also fixed a bug where lasers did not get destroyed on impact with the walls
Fixed more L4 and L2 bugs.
Merge branch 'L2DEV' of http://github.com/remulasce/X-Runner into L2DEV

Conflicts:
	Library/assetDatabase3
	Library/metadata/c7/c75f98769577fe24a8b13c7ca51d4dd2