Updated the geofencing plugin for android

Don't know if I need to change the files in this location or not, but anyway...

Added the possibility to survive a shutdown and startup. I don't know how the ios version works exactly but it's hard to notify the javascript listener when the application is not in the foreground. So now an Intent is send that will 'wakeup' the application and notify the javascript listener. Alternatively and maybe more nice is to have an intent that will fire from a notification.

Cheers,
      Erik Jan