progress towards start screen and AI binding
add start menu game setup
add game over screen
player unable to move gets passed over
add pass
move row_list into class variables
add occupying player info to tile
remove whitespace
remove unused options
remove class attributes humans_players computer_players
move active_players list to board object
move update_player_location() to board
move update_pushed_out_players() to board
move current_player to board
move next_active_player() to board
move update_player_item() to board
fix whitespace
move path_exists() to board
move no_possible_squares() to board
update pushed out players automatically