Allow for multiple plugin results

[micon4sure]

Feature Request

Motivation Behind Feature

This feature is present on the other platforms and it makes sense to be able to send multiple results, for example when opening a socket and passing the incoming data on to the web window

I have created an implementation for this feature, please see this pull request

[micon4sure]

It seems the devs of this repository don't have the time right now to address issues, PLEASE CONSIDER ADDING A MAINTAINER!

There is clearly need to work on the API to bring it up to the state of latest cordova main and the other cordova platform developments.

See related #239 #238 #218 #214

My pull request addresses all of these. Please consider merging!