Right Slide In Panel like WunderList App

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http://stackoverflow.com – I would like to see if anyone knows how WunderList did this? See picture: Basically, if you click on any List Item you add, this drawer pops out to show the item details. In this case I randomly added an item, apparently called "Rgh". Clicked on it, and it slides out from the right. You can swipe it and it goes back to whence it came from. I thought it was a SliderMenu library, perhaps one like jfeinstein10's, but Wunderlist already has a slider on the left. The one on the right (in picture) acts totally different. Its bigger, instead of pushing content, it just goes over the previou (HowTos)