First major step in Clue Game Players assignment. Several Changes:
 - Removed main method from Board.java (ClueGame.java will call main() )
 - Added ClueGame.java, the central object
 - Added Card.java (contains it's own enum CardType)
 - Added deck.txt, contains raw data to be parsed by ClueGame.java on startup, then passed to
      a deck object maybe...? Will resolve.