Updated to allow access to TileEntities information since this was required to properly render skulls.
Added skulls and did appropriate work for all north directions.
Not all rotations of skulls are working since this is rotating a 3D block it's a little strange

Screenshot at: http://i.imgur.com/q0aCI.jpg

Also minor update to ensure that Ender Frame Portals with inserted Ender Eye will display the eye properly.