Anvil Patch - Evil

Repairing, combining, enchanting, and renaming all cost 0 XP with this mod installed.   The GUI also shows no XP cost.   Currently no config options.   (Inspired by Anvil Patch - Lawful by lumberwizard.) Thanks to https://github.com/mouse0w0/forge-mixin-example for teaching me the ultimate power of Mixins.