Implemented difficulty killcredit for QuestMgr::OnPlayerKill function.
Implemented difficulty killcredit for QuestMgr::OnPlayerKill function.

Appled/AscEmu,master312/AscEmu,master312/AscEmu,AscEmu/AscEmu,master312/AscEmu,Appled/AscEmu,master312/AscEmu,Appled/AscEmu,master312/AscEmu,AscEmu/AscEmu,AscEmu/AscEmu,master312/AscEmu