Rework armor.yml to take item names instead of IDs in advance of 1.7 changes.

** YOU WILL NEED TO REDO YOUR armor.yml FILE **
Added Carrot on a Stick, and Flint & Steel to repair.vanilla.yml
Rework custom tool config.

** YOU WILL NEED TO UPDATE YOUR CONFIG TO THE NEW FORMAT **
Redo blocks.yml

** YOU WILL NEED TO UPDATE THIS FILE **
Use class names to better find custom entities.
Add custom mobs automatically as they're killed.