MineShaft Events - Added a large variety of MineShaft Events
-Added BeforeBuriedItemCheckEvent -Added BeforeStoneItemCheckEvent -Added PlayMineSongEvent -Added ChooseLevelTypeEvent -Added LoadMineshaftLevelEvent -Added PrepareElevatorEvent -Added CreateLadderDownEvent -Added GetOreIndexForLevelEvent -Added GetMineAreaEvent -Added GetMonsterForLevelEvent -Added GetExtraMineShaftMillisecondsEvent