Cordova Quickstarts don't link to Variant setups

Currently in the Push Quickstarts, for Cordova, there is no link that tells the user how to create the Android/iOS variant and the steps needed for their respective platforms

Similar to this, https://github.com/aerogear/aerogear-push-helloworld/tree/1.0.x/android#2-register-application-with-push-services