Feature request - Floating action button on border of content view and header view

[tpfaff]

As per google play music, the floating action button moves with the lower content view. This is similar to the header overlay feature, except that this view should border the content view and the underlying headerview. I'm having a really hard time implementing this right now using the existing library. Reason being, If you set a clear view behind the top half of the button, then that empty space is treated as part of the content view, so behind that view is not the header view, but the "far back" of the application.