Made NPCs now work properly on multiworld system. Solved multiple issues
regarding Player Shops not giving back items properly when owner exits.
Added restriction on changing channels at FM rooms, preventing shop
owner entering Cash Shop.
Added true protection against race conditions on player trades and fixed
some situational issues. Character's quest status table also received
concurrency treatment. Quests with time limit now expires properly.
Increased subtly the performance on the server start-up.
Added mechanic for the scrolls for spikes on shoes and cold protection
on capes. Fixed an issue where equipped items were being counted towards
materials for quests, therefore showing odds behaviours when completing
it. Fixed some minor issues on the dollhouse quest/event.
