Pigsteel [Forge]

Added Stairs and Slabs

Added a waxed versions of Stairs, Slabs and some other Blocks

Waxed Blocks can be crafted in a crafting table by combining the block with an honey comb

Zombification for Cut Pigsteel Blocks, Stairs and Slabs

Fixed a bug where Pigsteel could generate in a block other than Netherrack