Implemented AmoriaPQ. Fixed an issue with ItemIdSortHandler where empty
vectors given to the sorting module would cause an exception thrown,
wiping players inventory items. Thanks to Vcoc, revamped shop data for
GMShop (shop id 1337). Mount quest for explorers now uses event script.
Added more quests on Masteria and updated drop data in the region. Fixed
mystic door on slopes deploying players unproperly. Fixed mounts
equipped by low level players crashing the client.
