Translate model coordinates to view coordinates.
Config coordinates are now of the room grid.
Fixed coordinate conversion in view.

Model coordinates designate the center of the object, while the view designate
the upper-right corner of the object. This was neglected in the code before,
but now fixed.
Physics engine notifies moving objects.

So Sten can now properly move again.
View updates Sten's movements.
Removed parse code from Room