Quest events and customizations

Added EVENT_ITEM_TICK for interactive item quest scripts.  (See https://github.com/josheb/quests_dc/blob/master/items/12204.pl)
    Added simple account flags.  Would this work better as an additional qglobal category?
    Added SendMessage to EQW, useful for using CURL to broadcast to the server.
    Added WorldShutDown to EQW for timed world shutdowns, also updated console worldshutdown command to optionally use timed behavior.
    Added numerous modding hooks and mod_functions.cpp for easy custom formulas or future lua integration.
    Added various rules for monk AC bonus weight, archery bonuses, kick/bash stuns and mob stun levels.