upped version to 2.3.0
[BlackBerry10] Add support for BB10 platform

This uses the exec proxy to wrap functionality from com.blackberry.push.

Documentation available here:
http://developer.blackberry.com/html5/documentation/v2_1/push_service.html
[Android] Switch to v4 support library from v13

The v13 library in this project doesn't include all of the classes within the SDK.

This is a problem when another plugin requires classes from the support library that were stripped out of this file.

Since only v4 is needed, I have added a dependency to Google's support library plugin.