Driver Improvements, Gameduino2, Colors Mapped

Minor enhancements to the driver have been made. This includes padding
text messages to a multiple of 4 bytes.

Added some register configurations from the Gameduino2 code to try and
fix an subtle roll in the Gameduino display. This didn't seem to help,
I will need to look into this further.

I mapped out all colors of tiles and text from the original U2048 game
stylesheet.