Made critter extend movable
Added code to check if went through wall with radius check.
Cleaned up critter stuff
Fixed critter position vector on spawn
Update to prevent invisible enemies...
Reduced number of critters, reverted collisions with movables
Made critters addable, but nothing cleaned up yet.
Resolved merge conflicts
Merge pull request #23 from tpott/feature/movableenemies

Critters integrated but don't spawn