performance stuff, and other things?
Merge branch 'master' of https://github.com/soldieroflight/drunken-octo-dangerzone

Conflicts:
	UnPossible/UnPossible/enemies.py
	UnPossible/UnPossible/game.py
	UnPossible/UnPossible/physics/physics.py
Merge branch 'master' of https://github.com/soldieroflight/drunken-octo-dangerzone