Note from faye:
  On Wednesday, we created a GUI interface to our board: TTTWindow.
  - TTTWindow is just an extension of JFrame.
  - We first configured our container layout to be a grid (BoardSize x Boardsize).
  - We then created a 2-d array of JLabels (BoardSize x Boardsize), and 
    added them to our container.  
  - note: I further enhanced this (this evening) to add etched borders to each label, and
    to horizontally centre the text on each label.  As well, I eliminated the pack command
    which caused the gameboard to be unusually small, and changed the JFrame size and location
    to make it more viewable.
    
  Today (Friday), we considered how to put the pieces together.
  - We have a complete board which would allow us to play the game using method calls.
  - We have a GUI window which displays our board in an eye-pleasing way.
  - How would we play the game with this?  Well, we considered the steps we would have to
    take.  This is a rough description of the algorithm we came up with.
    1) Create a new TicTacToe board game (t).  Initialize it.
    2) Create a window (w) using our new board game.  Initialize it.
    3) Player selects move
    4) (t) makes move.
    5) (w) is updated to reflect new move.
    6) (t) checks for winner or draw
    7) If no winner or draw (check using t methods)
         then switch player and loop back to step 3)
       else
         dislay winner or draw message, and end the game.
    
    - We decided to use JOptionPane.showInputDialog to get our user moves, assuming
      that the 1st and 3rd characters input represented the numeric row/column entered.
    - We learned how to convert a number written as a character to the integer it represents.
      (you should try this in interactive mode!  Why does this work?).
    - Since class, I added code to verify whether the move is valid or not, and if not, to loop.
 
     There are good hints, examples and instructions in the swing tutorial:
     http://java.sun.com/docs/books/tutorial/uiswing/
   
    Final comments from faye:
    We are coming down to the last few weeks.  Every course is demanding work and it can be hard
    to balance and still stay sane.  However, I recommend that you do not leave Assigment 3 to the
    last minute.  Our deadlines are fairly fixed and most people have used up their grace day.  Get
    started so that if you are confused, you can come for help or clarification (or to TA).
    
    When starting this assignment, think about the principles we applied here.  First we designed a
    board that would let us play using only method calls if we wanted.  Then we built our GUI. 
    Before putting it all together We first considered the steps that would be required to play the 
    game, then implemented them in our game class.  I recommend that you get things working properly
    before you worry about how "fancy" your gui is.  Fine tuning can take a lot of time, and is best
    left to the end.
 
    Good Luck!