Gomoku Game

The game Gomoku is very similar to tac-tac-toe, but instead of a 3x3
board, a 5x5 board is used, and insead of 3 in a row being the win
condition, 4 in a row is used.  This program implements a game between the computer and a created AI program.  The AI program is implemented using the ideas of binary trees and alpha-beta pruning.