Fixed dynamic generation issue via precompiling

Modified main routine of CardConverter to generate all card images
Modified makefile to generate images if not present in data directory
Modified gui.pde to load pregenerated images

Issues:
    loaded images are not wiped on redraw, leading to abnormal behavior in edgecases (!=12)
    No endgame conditions, leads to infinite call loop to refill the deck
Propsed features:
    Add hint/cheat feature to display sets
    Add display for score counter
    Place new cards in emptied slots
    Undo/new game function