V4.0 - LED Matrix work

As I'd sort of expected, I have decided that V4 will be higher-res. I hope it to be way higher-res, but we'll see. The plan for now is to use an Arduino board (that has been burning a hole in my project table) for the control. It has a pretty fast chip, 10MHz, so I'm hoping it'll be able to keep up with all my spinning about.

I got all the pieces in the mail that I'd need, had the Arduino, a couple LED matrices, and a couple matrix controller chips from Maxim-IC (MAX7221). Putting this all together is a heck of a lot harder than re-arranging the parts on the SpokePOV, but here goes.