title: GCM Web Page to add certificates
body: <p>Some GCM push notifications certificates where expired. I have renew the certificates i iOS but notifications doesn't arrive. Then I have gone to the web <a href="https://developers.google.com/mobile/add?refresh=1" rel="nofollow noreferrer">https://developers.google.com/mobile/add?refresh=1</a> to configure again de certificates. When I choose the project, iOS platform, then the page to add p12 certificates files. The web shows an error in the upload section and it seems it doesn't work well. </p>
  
  <p>How could renew the gym certificates for iOS platform?</p>