Cleanup and Some Fixes

Removed gun mechanics, they're just a nuisance.
Temporarily brought back the cauldron and mortar, don't use them if you
don't want weird crap to happen.
Cleaned up some classes.
Added a sound effect to the ender pearl cast.
Added Ender Staff's missing recipe.
Made the destruction catalyst toggleable, should auto-consume gupowder
and store it internally.
Fixed Alkahestry Crafting Recipe crash due to config rename.
Dumped an unused packet handler.