1. Made World Thread available as dungeon loot
2. Removed useless config options for loot that doesn't appear anymore
3. Tweaked some config names and variable names for consistency
Changed our loot generation. Instead of relying on Minecraft's built-in
loot categories, we now have our own static loot category. There are two
types of chests now. Regular chests contain randomly-picked coal, iron,
gold, diamonds, emeralds, quartz, enchanted books, and golden apples
(very rare). We also have a function for filling out "grave chests",
which occur in 1 out of every 7 chests. Those contain rotten flesh,
bones, and some armor pieces and equipment that are assigned random
damage values and occasionally also get level 1 enchantments. Small
changes were made to various files to incorporate this update.
