While I was adding ADM support to UPS I took some notes on the different steps. You can check these notes here : https://gist.github.com/sebastienblanc/9615439c67968ecb92da 

The purpose is to help anyone that would like to add a new Push Platform.

Maybe, we could also add that somewhere on aerogear.org in the contribute section.

Enjoy (and report if you find weird things in the Gist) 

Sebi