public function createImageCaptchaAction()
 {
     $captcha = new Captcha($this->getRequest()->getSession());
     $captcha->outputImage();
     /*return new Response(
           $captchaText,
           200,
           array(
               'Content-Type' => 'image/png',
               'Cache-Control' => 'no-cache'
           )
       );*/
 }