Completed spec for winner.
Added Console and draw_board.
Added Console#prompt()
Removed human_player spec for now.
Added basic AI class.
AI should block opponent's winning moves (basic).
xit this test for now.
Added more tests for Game#game_over?
Clean up it messages.
Deleted Rules and rules spec.
Test AI#move() on non-empty board.
Added Game#turn()
Refactor Game player token constants out.
Added game#turn and tests.
Added a test to ensure turn starts with player1.
BugFix: Board would seem full if we filled in the last spot in the array.
Added Game#play() and tests.