Ore refactoring

[kaadmy]

I'm thinking of renaming some ores, as well as adding a few more new ones for the sake of realism and a larger gameplay challenge.

The changes I'm thinking of are:

• Rename Steel to Wrought Iron
• Make Wrought Iron tools less durable than Stone tools but have a faster digging time
• Add Graphite as a form of minable carbon to smelt Steel with (As well as possibly being used for writing/drawing)
• Add in "Steel" as a form of Wrought Iron that's a lot more durable
• Add Tin as an alloy material for making Bronze
• Add Copper as an alloy material for making Bronze and possibly wiring
• Add Bronze as a tool level that is more efficient but wears faster than Carbon Steel
• Make Gold a raw mined lump that has to be smelted to become ingots
• Add Sulfur as a mineral primarily used as a fertilizer