Listener for disabled days click

[feliperce]

I need to handle disabled days click, it's possible?
setOnDateChangedListener only handle enabled day click.

I know this issue #769

But I need this listener... I need to show toast msg for the user saying this date are not disponible.
I can change the color of date to make it like disabled days, but I need to prevent it to be selectable (don't show the selectable circle for this date)