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/Chat/Commands/Level3.cpp

@@ -3996,10 +3996,7 @@ bool ChatHandler::HandleGuildInviteCommand(const char *args)
         return false;
 
     // player's guild membership checked in AddMember before add
-    if (!targetGuild->AddMember (target_guid,targetGuild->GetLowestRank ()))
-        return false;
-
-    return true;
+    return targetGuild->AddMember(target_guid);
 }
 
 bool ChatHandler::HandleGuildUninviteCommand(const char *args)
@@ -4018,7 +4015,7 @@ bool ChatHandler::HandleGuildUninviteCommand(const char *args)
     if (!targetGuild)
         return false;
 
-    targetGuild->DelMember (target_guid, false, true);
+    targetGuild->DeleteMember(target_guid, false, true);
     return true;
 }
 
@@ -4045,11 +4042,7 @@ bool ChatHandler::HandleGuildRankCommand(const char *args)
         return false;
 
     uint32 newrank = uint32 (atoi (rankStr));
-    if (newrank > targetGuild->GetLowestRank ())
-        return false;
-
-    targetGuild->ChangeRank (target_guid,newrank);
-    return true;
+    return targetGuild->ChangeMemberRank(target_guid, newrank);
 }
 
 bool ChatHandler::HandleGuildDeleteCommand(const char *args)