Added LiveObject class and stubs of its methods.
Added LiveObject class to buildsystem.
Added  some stubs to ObjectManager class.
Placed object is no more agregating Object, now its derives from this type.
Removed PowerBall object and added Car object with its snapshot.
Added ObserverPtr typdef. Observer now uses MapPtr instead of ref.
Changes in World class - filling missing parts of code.
Small fixes in car displaying in View.
Adjusting object creation in main to new constructor args.