protected function registerAutoloader($app)
    {
        // now configure a new autoloader spl configuration
        $autoloaderApp = new Doozr_Loader_Autoloader_Spl_Config();
        $autoloaderApp
            ->_namespace($app->namespace)
            ->namespaceSeparator('_')
            ->addExtension('php')
            ->path(substr($app->path, 0, -1))
            ->description('Autoloader for App classes with namespace: "'.$app->namespace.'"')
            ->priority(0);

        Doozr_Loader_Autoloader_Spl_Facade::attach([$autoloaderApp]);
    }