ICC BQL/VDW major update + minor fixes/improvements (#929)

LDW
Improved spreading for ranged, tanks will move boss in the middle of the room now when shield is depleted which will make bots bug less around pillars

GS
Assist tank will not teleport to enemy ship and will keep tanking adds on our ship now

DBS
Ranged spread improved (they will calcualte spot for each bot and stick with it reducing movment to minimum), fixed bug where in 25 man ranged bots would go behind walls, making them unable to dps boss, improved rune of blood tanking

Festergut
Ranged spread improved (they will calcualte spot for each bot and stick with it reducing movment to minimum)

BQL
Melee spread improved, bite logic improved, added swarming shadows logic (not perfect but at least it wont be all over the room anymore), Tanks will properly handle blood mirror now

VDW
Boss and raid healers will be automatically assinged depening by number of healers(if more than 3 healers in group, 2 will focus on raid and others will heal boss, otherwise one healer will heal raid).
Druids will be assigned to raid healing if no druid present then some other random heal class.
Added rotations for druid healers if they end up healing the boss.
Raid healers will not use portals anymore.
Healers will come to the ground now after using portals (they were stuck in air)

src/strategy/raids/icecrown/RaidIccStrategy.cpp

@@ -114,7 +114,7 @@ void RaidIccStrategy::InitTriggers(std::vector<TriggerNode*>& triggers)
         NextAction::array(0, new NextAction("icc bql pact of darkfallen", ACTION_RAID +1), nullptr)));
 
     triggers.push_back(new TriggerNode("icc bql vampiric bite",
-        NextAction::array(0, new NextAction("icc bql vampiric bite", ACTION_RAID + 2), nullptr)));
+        NextAction::array(0, new NextAction("icc bql vampiric bite", ACTION_EMERGENCY + 5), nullptr)));
 
     //VDW
     triggers.push_back(new TriggerNode("icc valkyre spear",