Cheap Anvil

make anvil action only cost 1 level.

Note: with this mod, you'll not be able to modify inventory name. This is the limitation of forge.

Tested on Forge version: 12.16.1.1887, Minecraft version: 1.9

Changelog:

1.1.1: Fix a bug that repair enchanted item costs level.

1.1: Now repair does not cost level.