Game server/skill system: stops "cat's eyes" from applying to the party.
Game server: fixed letter items being placed in the wrong slot; resolves #380.
Game server/quest system: implemented GetActiveQuestID() & exposed it to Lua (as "ExistMonsterQuestSub" for original scripts); resolves #377.
Implemented [National Enchanter] 31508_NEnchant.lua script.