MineChess 1.3.1

-Added localization support.
-Added Dutch localization.
-Added Spanish localization (made by DancingPeral).
-Added the ’3 times same position or 50 turns no active move are a valid claim for a draw’ rules along with a related ‘/draw’ command, which allows players to request a draw.

-Bugfix: IndexOutOfBoundsException very rarely when activating the AI.