Ore Variants

Implement more ore variants for Tuff, Granite, Diorite, Andesite -- also look into creating variants for Poor, Normal and Rich ores.

• Poor Ore: Yields 1x (fixed, no fortune allowed)
• Normal Ore: Yields 1x (w/ fortune allowed to boost drop rates)
• Rich Ores: Yields 2x (w/ fortune allowed to boost drop rates)