Modificacion para que soṕorte Andriod 2.x

I had a problem using your plug-in on andriod 2.2. It was the Notification Builder.  I made this changes to resolve the problem. 
However, you need to install  Android Support Library  in order to use this package: android.support.v4.app.NotificationCompat

Yet I could't try on androir 4.x .