Core: Add new system for parallelizing client packet processing. Handle WorldSession updates in Map::Update() where we are safe to proceed. Patch by Ambal.

(And clean up tabs and whitespace while rummaging around in there)
Closes issue 5084.

--HG--
branch : trunk

src/server/worldserver/Master.cpp

@@ -134,7 +134,7 @@ int Master::Run()
     sLog.outString( "      \\/_/\\/_/   \\/_/\\/_/\\/_/\\/_/\\/__/ `/___/> \\");
     sLog.outString( "                                 C O R E  /\\___/");
     sLog.outString( "http://TrinityCore.org                    \\/__/\n");
-    
+
 #ifdef USE_SFMT_FOR_RNG
     sLog.outString( "\n");
     sLog.outString( "SFMT has been enabled as the random number generator, if worldserver");