Created Lightning Potion Sprite

Created the lightning potion sprite and updated the powerups .ai file.
-Travis
Put Lightning potion in zero
Merge branch 'powerups-branch'

Conflicts:
	gamefiles/Content/__pycache__/py_character_movement.cpython-32.pyc
	gamefiles/Content/__pycache__/py_level_logic.cpython-32.pyc
	gamefiles/Content/__pycache__/py_pickupSettings.cpython-32.pyc