[10682] New table 'item_convert' for convertion items.

* Implment vendor at show replace BoA item with reputation requirement
  by identical item without rep. reqs for player that fit this requirements
  of original item.

* Table also can be used for store item convertion data form one team items
  to similar other team items. This case not impement but added function easy
  used for it.

* Note: strict single convert for item not created problem for both way use:
  item converted for same team or all, can't be original item for conversion to
  another team.

src/game/World.cpp

@@ -998,6 +998,9 @@ void World::SetInitialWorldSettings()
     sLog.outString( "Loading Items..." );                   // must be after LoadRandomEnchantmentsTable and LoadPageTexts
     sObjectMgr.LoadItemPrototypes();
 
+    sLog.outString( "Loading Item converts..." );           // must be after LoadItemPrototypes
+    sObjectMgr.LoadItemConverts();
+
     sLog.outString( "Loading Creature Model Based Info Data..." );
     sObjectMgr.LoadCreatureModelInfo();