title: Blank Google Map on Android Device/Bluestack, But not when Debug
body: <p>My Google Map doesn't show up when installing on Android Device/Bluestack, but it is ok when debugging.</p>
  
  <p>I installed using the apk produced with "Generate Signed APK" menu.</p>
  
  <p>Error message (when using Bluestack): <code>E/Google Maps Android API﹕ Failed to load map. Error contacting Google servers. This is probably an authentication issue (but could be due to network errors).</code></p>
  
  <p>Please help.</p>