Show board after each turn
Improve check_game_over? to look for winning combos
add tests for check_empty?
Refactor, inject board into game, rewrite mocks in game spec
Refactor make_next_move method so it doesn't check for an empty position
Change get_move so it checks the board for empty spaces
Add first test for dumb_prompter
Add second test for game.play
Made stub_prompter helper method
Refactor, add another test for game.play