First commit. Add prelim files/classes.
Add require relatives to files
Add functionalities to Piece class: move_list, deltas, on_board?, enemy_occupied?
Finish set pieces for Board class; display up and running
Change enemy_occupied to occupied_checker; works both teams
Add make_one_move, successfully moves slides/jumps
Fix jump bug; both jump + slide work correctly
Colorize board, fix display
Refine gameplay, cursor works, start game logic
Finish game code; handle any error
Add load/save, add over? check
Fix load game error
Finish working copy; fix bugs
Add blinking cursor when on game piece