*add autograder.py (2014/4/3)
*add commands.txt (2014/4/3)
*add eightpuzzle.py (2014/4/3)
*add game.py (2014/4/3)
*add game.pyc (2014/4/3)
*add ghostAgents.py (2014/4/3)
*add ghostAgents.pyc (2014/4/3)
*add grading.py (2014/4/3)