Dungeons spawners now spawn mobs
25% for a spider, 25% for a skeleton and 50% for a zombie spawner.
Using static cast for Dungeon spawners
Suggestions by xoft
Using IntNoise3D to prevent needless floating point math
Using IntNoise3DInt instead of IntNoise3D
Fixed forgotten semicolon
Merge pull request #1634 from mc-server/DungeonSpawners

Dungeons spawners now spawn mobs