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Project Part 3 (and 4)
1) 2 or 4 players
        - Each player must track current position of each player and where the walls are
        - last_move() -> what happened (i.e., how did the board change) after the last player moved

2) PlayerMove class -> no change
        (playerId,   move,  start,      end)
         0,1,2,3^    T/F^    ^coordinates^

3) player module -> 3 functions
        i) init() -> unchanged
                (gameFile, playerId, numPlayers,     playerHomes,                       wallsRemaining)
                  Board^   0,1,2,3^   2 or 4^    playerHomes[playerId]^         wallsRemaining[0]->2 player mode
                                                                                wallsRemaining[1]->4 player mode
        ii) move() -> unchanged, random
        iii) last_move(playerData, playerMove) returns playerData
                         board^        ^state after another player moved (do not need to verify other players)

4) Supplied player modules -> .pyc files
        - 4 copies of each
                - player_human
                - player_badcomputer -> random, must beat in 2-player mode for part 4
                - player_goodcomputer -> better than random
        - You may use multiple copies of your own player module if you would like
        - Make a complete copy of your source code & give it a unique name
                - e.g., player_p242-07c.py

5) Submit by 2:00 am Feb 1st.
        - player module in 2 or 4 player mode
        - quoridor3.txt
                - names
                - modifications from part 2
                - pseudocode for last_move