Support CoordinatorLayout

[Jawnnypoo]

It would be great to figure out how to support CoordinatorLayout since this is used as the root layout in many cases. I tried to do so at one point, but ran into a bunch of behavior issues where things no longer worked as they should.

[nikhilpanju]

I'm facing this issue too. Trying to implement it at this moment. Would be great if you could support it!

[drozdzynski]

Any progress with CoordinatorLayout?

[ScuAdam]

Hey guys, if you want to use pull down finish with CoordinatorLayout, pull-back-layout may will help you.
PS: you must include CoordinatorLayout into a RelativeLayou or any one else View, code like below

`<ooo.oxo.library.widget.PullBackLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/puller"
android:layout_width="match_parent"
android:layout_height="match_parent">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </android.support.design.widget.CoordinatorLayout>
</LinearLayout>

</ooo.oxo.library.widget.PullBackLayout>`

[dellisd]

I forked this repo and successfully managed created a ElasticDragDismissCoordinatorLayout class, and it works! A problem occurs with CollapsingToolbarLayout however. The Drag effect starts before the collapsed toolbar has re-expanded.

Nonetheless, I'll create a PR.