Add Mobile PUSH Notification support via FCM

[kn9ts]

The current support of Project Mulla favours web applications only. What if one just wanted to build an app without the web server as the endpoint on the other side of Project Mulla

The last SAG POST which takes place on a successful complete transaction can be conveyed to Project Mulla and pushed to the device using Push/Cloud messaging using XMPP.

Can be for Milestone v1.1.0

[roboflank]

:+1:

[antonymuga]

Oh, thats helpful.

[kn9ts]

@antonymuga I'd assume you'll temporarily use this before moving to the "new" Safaricom daraja. So implementing won't be necessary anymore