Core/Guilds: guild code was completely refactored and rewritten.

* OOP desing and implementation;
* all the queries are moved to prepared statements;
* guild loading is optimized;
* all the possible interaction with guild's data is done inside the guild class;
* added more hooks to GuildScript class;

WARNING: Make sure you backup your characters database before applying this change (just in case).

Known problems with guilds:
* when new member is added to the guild, MOTD is not displayed for him in guild tab of social window;
* if you add item with random property to guild bank visual representation of item below it becomes wrong (it displays wrong stack number);
* packets order differs from official: currently guild bank packet traffic is twice as more than on offy.

--HG--
branch : trunk

src/server/game/Entities/Item/Item.h

@@ -245,7 +245,7 @@ class Item : public Object
         bool IsBindedNotWith(Player const* player) const;
         bool IsBoundByEnchant() const;
         virtual void SaveToDB(SQLTransaction& trans);
-        virtual bool LoadFromDB(uint32 guid, uint64 owner_guid, PreparedQueryResult result, uint32 entry);
+        virtual bool LoadFromDB(uint32 guid, uint64 owner_guid, Field* fields, uint32 entry);
         virtual void DeleteFromDB(SQLTransaction& trans);
         void DeleteFromInventoryDB(SQLTransaction& trans);
         void SaveRefundDataToDB();