Model Objects now correctly display all of their attributse and description.
Relations can also be removed, and they have little floating tags that float inbetween the objects involved.
I also changed the way the window Id's are assigned. The GameModeller now handles which Id is the next available one, and
you can get it via a static method.

Relations still cannot have their properties defined, but I think this is good enough to at least do the heuristic eval.