Demonic Priest Origin

Adds the Demonic Priest origin to the Origins mod

Demonic Priest:

+ You get a book that has the power to spawn either two iron golems, 5 zombies, or 3 vexes

+ You get a book that can either give you buffs with a few debuffs, or give enemies debuffs but you also get a few debuffs

+ You get a book that either heals you or deals damage to enemies close to you 

- You only have 8 hearts

- Permanent weakness

- Water hurts you (not rain)

- You can't hold a shield