/**
  * Initializes the routed Controller and executes specified action
  *
  * @return \PHPixie\Response A Response object with the body and headers set
  */
 public function execute()
 {
     $class = $this->param('namespace', $this->pixie->app_namespace) . 'Controller\\' . ucfirst($this->param('controller'));
     $controller = $this->pixie->controller($class);
     $controller->request = $this;
     $controller->run($this->param('action'));
     return $controller->response;
 }