Implemented Guild PQ. Fixed a problem introduced earlier where negative
EXP would be deemed as "integer overflow", provoking many game breaking
issues as result.
Added a queue system for waiting guilds outside the GPQ area. Changed
the way players are transported through maps on non-portal passing
cases: if not defined, a spawn point is chosen randomly for each player.
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.
