Use a nightly build of all branches on nuxeo-mobile / use hockeyapp

Have a "nightly" build of all branches on the nuxeo-mobile repository that will push the built artifacts (APK, IPA) to HockeyApp (https://hockeyapp.net):

Create an account for Nuxeo on HockeyApp.
Integrate Fastlane and HockeyApp.
Create new Jenkinsfile-nightly files for both iOS and Android that will build and upload to HockeyApp each night. See if we can add some metadata such as the branch built.
The typical flow for a new work branch:

Jenkins creates automatically new "nightly" jobs for iOS and Android when pushing the new branch (using multibranch pipeline).
The first run builds the APK/IPA and uploads it to HockeyApp, with metadata such as the branch being built.
Each night, the job builds the APK/IPA and uploads it to HockeyApp, with metadata such as the branch being built.
=> Each morning, a set of APKs/IPAs are available on HockeyApp to test each branch, master included.