DB/SAI: Added SAI for some mobs in Icecrown Citadel
Core/LFG: Fix being unable to re-queue after leaving queue
DB/Misc: Rescue from Town Square

Based on original script by @untaught

Closes https://github.com/TrinityCore/TrinityCore/issues/1864
Merge remote-tracking branch 'upstream/3.3.5'