Refactoring

The problem with quick prototyping is that while it is great for making sure that the core functionality works, it leads to sloppy coding. So, while was able to get my Implosion chips to show up on the
screen and link together as a sequence, I was breaking a few design rules as I did so.

So last night, I did some refactoring - I realized that much of what I had written for the Chip class was stuff that I would like to generalize. I need to be able to keep track of a 3d object's location and orientation, as well as it's reference in the sio2 resource list.

The second benefit to pulling the graphics object out of the Chip class is that it makes Chip less dependent on SIO2. If I should someday decide to go to a different rendering engine, it will be
easier to make the change.

The new class is called VisualObject, and Chip now inherits from it. I plan to extend VO for several other classes, too.

Oh, and I'm working on documenting my code a bit, too.