DB Schema/Characters: removed columns auctionhouse.item_template, character_inventory.item_template, guild_bank_item.item_entry and mail_items.item_template and created item_instance.itemEntry column instead of them.

As a side effect moved related queries to prepared statements.
As one more side effect fixed not shown and lost mail items in returned expired mail (patch by Quriq14).

--HG--
branch : trunk

src/server/game/AuctionHouse/AuctionHouseMgr.h

@@ -61,6 +61,7 @@ struct AuctionEntry
     uint32 bidder;
     uint32 deposit;                                         //deposit can be calculated only when creating auction
     AuctionHouseEntry const* auctionHouseEntry;             // in AuctionHouse.dbc
+    uint32 factionTemplateId;
 
     // helpers
     uint32 GetHouseId() const { return auctionHouseEntry->houseId; }
@@ -70,6 +71,7 @@ struct AuctionEntry
     bool BuildAuctionInfo(WorldPacket & data) const;
     void DeleteFromDB(SQLTransaction& trans) const;
     void SaveToDB(SQLTransaction& trans) const;
+    bool LoadFromDB(Field* fields);
 };
 
 //this class is used as auctionhouse instance