Updating method to reset password to use a activation link, fixes #729

CREATE TABLE `panel_activation` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `userid` int(11) unsigned NOT NULL DEFAULT '0',
  `admin` tinyint(1) unsigned NOT NULL DEFAULT '0',
  `creation` int(11) unsigned NOT NULL DEFAULT '0',
  `activationcode` varchar(50) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=26 DEFAULT CHARSET=utf8;