0.8a Update

Sup everyone. This is a bit of a small update.

• Fixed an issue with lighting thread maxing out a CPU core.
• Finalized a bunch of half-made content
  • Drills added
  • Anvil, Alchemy Lab, Mechanarium, and the Refinery
  • Bunch of ores added
  • Some more pickaxes
  • Added recipes and textures for said things.
• Badguy AI and spawning tweaked.

I'll be taking a short break from coding for a few days. I'll be back soon, medical issues permitting.