Class Environment

	Environment contains everything in game universe that can be displayed. Performs
	Collision detection.

Attributes
	ObjectList
		Update objects.  Send messages for updates and drawing
Methods
	Update()
		Update position and properties(state) of objects
	Draw()
		Player draws objects	
	AddObject()
		Adds object to environment such as bullets
	RemoveObject()
		Remove object from environment such as bullets
	UpdateObject()		
		Update properties of object