I used Ludei's cloud compiler to build the apks.
The output build from C2 is a cocoonjs .zip file which is then uploaded to the ludei's site for compilation.
They send back two apk's, one a debug signed file that you can install and test but not upload to google play.
The other is an unsigned apk file that needs to be signed to be store ready. I sign and zip align the apk automatically with a batch script I wrote. It does this all in one fell swoop.
Now with the signed apk, I upload to to Google Play, enter all necessary information and wait a few hours to show up in the store.
That's basically it. Hope it helps.