Add Gesture to slideFromBottom

[CoericK]

Im using the slideFromBottom transition, i was wondering how to make it work so if the user starts sliding down the screen that is hidding at the top pushes the bottom screen.

So far what is doing is: The user starts sliding left to right and the top screen pushes the bottom screen.

[computerjazz]

You're probably going to have to implement your own gestures to get that functionality -- check out this branch for a start: https://github.com/computerjazz/rn-transitions/tree/dm-pullDownGestureNav