public static function cssLinkTag($href, $media = 'screen')
    {
        if (strpos($href, 'http') === false and strpos($href, '//') === false) {
            $href = Request::basePath($href);
        }
        return '<link rel="stylesheet" href="' . $href . '" media="' . $media . '">' . PHP_EOL;
    }