Spellblades and Such

Added functionality for the new Spellbooks in Spell Engine

Added new spells meant to be used via Spellbook with melee weapons: Tactical Dive, Riposte, Slam, Whirlwind

Many items can now be used to cast from Spellbooks as proxies

Divinity now works with all damage instead of just magic

Hex is now gained on all types of magic damage once more instead of just spell damage

Minor changes to Frostborn Gavel's model