Spell Effect Updates.
Implemented fail chances for SE, Gate, Succor, FeignDeath.
Minor fixes to haste bonuses to allow for negatives.
Rule added for Succor failure rate.
String updates
Level requirment for Summon Corpse spells
Implemented SE_NegateIfCombat
Merge pull request #136 from KayenEQ/master

Spell Effect Updates.