New Ores & ItemBlockMeta

I'd just stop trusting any promises by this point. Instead of the
gemstone items, I finally added some ore blocks for Copper & Tin (as
well as some new utility ores) and combined all ItemBlocks into a single
ItemBlock like it was before. No reason why they shouldn't be combined.
I make no promises for the next commit so that I can't inevitably break
them.