Initial software commit- preparing to function-ize the program.
Works with pushbutton.
vpg_test works quite well. Currently implemented:
 - run on hardware button press
 - constant redraw of image
 - error checking for # of fids vs # of commands
 - error checking for start tile not found

Need to add:
 - exclusion of spurious tiles
 - general button press response, with extra buttons
 - support for graphic LCD