Black Bronze Beehive Kiln

This mod adds a recipe for 'black bronze beehive kiln hatches' and modifies the tierless 'Fireclay brick kiln door' to also allow for black bronze parts and rods. Higher tier doors are unchanged.

Endless thanks to Fairyfloss' Early Beehive Kiln mod, whose code has been gracefully lifted and find-and-replaced into working with bronze instead of lead. I'll take this mod down on their request.