Added 3 new AI: Planned AI, Stubborn AI, and MostPlayed AI.
Planned AI always chooses 1st option 2k times, then 2nd, etc.
Stubborn AI always picks 1st option. Always.
MostPlayed AI picks the most likely counter to your most played move.
It does this by updating an array with the choices you made, then finding the most played and countering that.