Cleaned up and unified various sort predicates and moved them to Trinity namespace, replaced priority queues with sorts and purged some unused code.

--HG--
branch : trunk

src/game/ThreatManager.cpp

@@ -245,22 +245,14 @@ void ThreatContainer::modifyThreatPercent(Unit *pVictim, int32 iPercent)
         ref->addThreatPercent(iPercent);
 }
 
-//============================================================
-
-bool HostileReferenceSortPredicate(const HostileReference* lhs, const HostileReference* rhs)
-{
-    // std::list::sort ordering predicate must be: (Pred(x,y)&&Pred(y,x)) == false
-    return lhs->getThreat() > rhs->getThreat();             // reverse sorting
-}
-
 //============================================================
 // Check if the list is dirty and sort if necessary
 
 void ThreatContainer::update()
 {
     if (iDirty && iThreatList.size() >1)
-    {
-        iThreatList.sort(HostileReferenceSortPredicate);
+    {    
+        iThreatList.sort(Trinity::ThreatOrderPred());
     }
     iDirty = false;
 }