Attributizer

- added an "EQUALIZE" option which takes away or adds just enough to make the item give that much when held or equipped.

- EQUALIZE will use vanilla UUIDs when targeting attack damage or attack speed, such that the tooltip is shown properly.

- any type of modifier will now overwrite modifiers with the same UUID instead of being silently thrown away. 

- attributizing max health will set the mob's health to max at the end. This is technically out of scope but is requested often enough to warrant addition.