Pyromancer

-added mercury (can be found in nether wastes biome deep underground or by vapors)
-added mercury building blocks
-added brimstone (can be found in basalt deltas)
-added brimstone building blocks
-added slingshot
-added hogwhip
-added thermometer
-added bottle of vapors
-added hog trap
-added volcanic mark enchantment for blazing journal
-added ashen pages enchantment for blazing journal
-nerfed pigmen legion
-nerfed unburned
-bugfix