6.0 Changes

- Removed useless Cata scripts.
- Fixed Sub script to not crash on start due to settings object changes.
- Removed buff_spell_crit() and armor debuff from calcs. I guess
they’re gone in Warlords as well.
- Holy damage calculations changes batman! Built caches for repetitive
pieces of data while calculating damage. Saved a bit of computational
time, but might have ideas on how to do better (and clean up the code).