Created coal coke item

Created base item with texture
Updates

Removed un-needed methods. Made in to a fuel
Coal Coke block

Added a coal coke block, can also be used as fuel
Renamed / Moved textures
Moved coke item naming
Changed crafting format
The crafting for coke block should now be much more readable.
Moved coke to materials tab.
Moved to unified fuel handler
There's now one fuel handler for all our custom fuels, every tweak to fuels will go in there.
Manually merged feature-coke into master