Sound added to .exe

v4.0

Update README.md

Bug fixes and Restart Button

Fixes Bugs
-Stalemate bug
-AI not considering piece above it being placed
-More
Added Restart Button to restart after every game

AI Upgrades and Sounds

AI is now upgraded to play better.
Sound effects are now in the game.

Game Complete

Solo Player
Two Player
GUI
Backend
Title Screen
README