Mixed up some handlers and added fuel handler.

Mixed up some handlers and added fuel handler with a couple of fuels.
Fuels include 6 items smelted for Pure Matter and 64 items smelted for a
Magic Core. Of course that's not OP because it requires a Nether Star
and it's really only if you have one laying around your house and have
decided you have no use for it.
Background Work

Background work for mob drops. Especially *SPOILER* Bat Saliva used as a
fuel in the future.
Fixed GitHub's Durps

Fixed GitHub's Durps