added the controller classes for the model (box, paddle, world, gameover); implementation of the controller classes
implemented all of the model and controller classes, and started with the view classes (drawables and audibles from box and paddle are started)
cleaned up code; prepared merge with wurstpelles changes (paddle logic)
merged changes about boxlogic, paddlelogic
clean merge;
all classes added (4 models & controller + 8 views, for each of box, paddle, world, gameover);
implemented all models and controllers;
started implementation of the views (especially those of box and paddle)