ColinEberhardt/VCTransitionsLibrary — pull request #26 by DivineDominion (2014-05-08 14:13:30+00:00)
Title: split wiring pop-interaction controller & animator

At first I found it hard to follow why `-navigationController:animationControllerForOperation:fromViewController:toViewController:` was wiring the interaction controller to `toVC`. After some fiddling in my own app, I found the real event you meant was when a view controller is pushed on the stack to prepare the pop transition.

I find the change makes the intent clear and the code easier to follow.