Dev/jpsnyder/led

Finished implementation of core LED Matrix API. 
- supports creation of a full LED matrix made from smaller led matrices with any dimension
- supports adding points, lines, rectangles, sprites, and text
   - sprites can be made from a standard text file or from an image
- supports foreground and background elements

Requires testing with more than 2 led matices.
Requires a proper compilation of python or python3 by hand. (this will be fixed in the Makefile development in branch dev/jpsnyder/debian)