Separate the engine-part of game_actor

[Nearoo]

It doesn't really make sense to call game_actor.world to affect something engine-wide and game_actor.rect to affect something of the individual GameActor. Much better would be to get an argument engine and one game_actor. Maybe for that purpose, a static variable called "engine" should be added to GameActors - best would be a dummy-class that contains the engine-things.

[Nearoo]

The engine parts like input or world are made static two times: Once in EngineWrapper and then again in GameActorComponet - which is unneeded complication. I'll fix it.

[Nearoo]

NICE JOB ME