Added validator.js attributes 'data-pattern-error', 'data-rquired-error', 'data-match-error', 'data-error' to be specified in config.qfq.ini, Form or FormElement. Detailed setting will overwrite generic setting. If none is specified, take validator.js defaults.

HelperFormElement.php, AbstractBuildForm.php, Constants.php, QuickFormQuery.php.