public function download($req, $res, $args)
 {
     $theme = ThemeModel::getData($args['name']);
     if (!$theme) {
         $notFoundHandler = Container::get('notFoundHandler');
         return $notFoundHandler($req, $res);
     }
     $theme->nb_downloads = $theme->nb_downloads + 1;
     $theme->save();
     $version = isset($args['version']) ? $args['version'] : 'master';
     return Router::redirect('https://api.github.com/repos/featherbb/' . $theme->vendor_name . '/zipball/' . $version);
 }