Homework 10 - AI - Added AI to the game. The AI uses monte-carlo simulation(using sampling)
 - to calculate the probability of winning a hand. Then assesses the "risk to reward ratio"
 - to calculate the best move for the situation. AI does a buy-in of 10000 chips by default.
 - AILogic.java and AIHelper.java have the logic for AI.

 - Support Single player mode - Made the buy-in process sequential to support the single player mode.