Add support for recruit-a-friend XP and reputation multipliers.

More research needs to be done to implement summoning and granting levels.

--HG--
branch : trunk

sql/base/auth_database.sql

@@ -63,6 +63,7 @@ CREATE TABLE `account` (
   `expansion` tinyint(3) unsigned NOT NULL default '2',
   `mutetime` bigint(40) unsigned NOT NULL default '0',
   `locale` tinyint(3) unsigned NOT NULL default '0',
+  `recruiter` int(11) NOT NULL default '0',
   PRIMARY KEY  (`id`),
   UNIQUE KEY `idx_username` (`username`)
 ) ENGINE=MyISAM AUTO_INCREMENT=5 DEFAULT CHARSET=utf8 COLLATE=utf8_general_ci ROW_FORMAT=DYNAMIC COMMENT='Account System';