Added Support for More Metadata Rotations

Added support for rotating the metadata of powered tracks and detector
tracks. Also made a minor change to DungeonSchematic to protect its
internal state.

StevenDimDoors/mod_pocketDim/dungeon/DungeonSchematic.java

@@ -63,7 +63,7 @@ public class DungeonSchematic extends Schematic {
 	
 	public Point3D getEntranceDoorLocation()
 	{
-		return entranceDoorLocation;
+		return entranceDoorLocation.clone();
 	}
 	
 	private DungeonSchematic()