Software - 7-Segment Display (MAX7219)

I rewrote the  Arduino LEDControl (http://playground.arduino.cc/Main/LedControl) to do all ASCII characters. Some good, some OK and a few bad.

https://github.com/brodykenrick/MAX72xx_SPI_Arduino

I added a greater range of characters, support for double-wide characters (like M and W) and generally made it better for use as a alpha+numeric display (rather than just numbers).