Make perl truely optional (Dalaya)
PERL ON BY DEFAULT - THANKS DALAYA
NULL check in Merc::CalcItemBonuses
NULL to nullptr
Fix Auto XTargets not clearing on death
Change NULL to nullptr in RemoveAutoXTargets()
Merge pull request #49 from addtheice/master

NULL to nullptr
Merge pull request #50 from j883376/master

Fix Auto XTargets not clearing on death
Merge from upstream & fun conflict resolution with the nullptr changes.
RCM: Changed NULL to nullptr.