Profession API

I'll create an example mod utilizing professions when I have time, but if you wanna start now, have a look here, here and here. Feel free to PR new events / propose changes, as I'm not that experienced with creating APIs

Fixes / changes

• Fixed conflicts with Gunpowder Utilities (thanks @Martmists-GH)
• Fixed Taterzens not being removed after killing when doing /npc list
• Make Taterzens dissapear in batch
• oh and there's forge version now btw, which means jitpack will 99% be broken. sorry, I'll try to find a fix.