Add support for misc mods in Uniques and Tree (#554)

* Projectile speed for spell skills, and % chance
for 2 add. projs. for spell skills

* quick fix, fireball quality works now

* made "for spell skills" and moved code to better
locations

* Many changes to passive tree, some unique mods and
gems

* Mod Parser fixes

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Co-authored-by: LocalIdentity <localidentity2@gmail.com>

Author: Blitz54