Just some more cleaning up really, but still important to write down somewhere.

• Dungeon monsters now have a chance to drop a random booster
• `/is top` has been updated to properly measure spawners and other blocks.
• I've introduced spawner stacking. Shift-Right Click with like-spawners to stack them.
  • If you already have spawners placed, breaking and placing them will spawn a hologram
  • As of currently, stacking spawners will cause them to not show up in `/is top`. I'm looking into a fix.
• Changed some more item values; also noticed Sell Wand was selling for incorrect numbers for a little bit

We will also be adding some new things for hoppers and some new automation tech.

Hope you're having fun! Enjoy!