April 10th, 2015
Today spine-unity gets a new feature: it can now generate Unity colliders from Spine bounding boxes, including the ability to change (or hide) the bounding box for a slot during an animation (or through code). Hit detection and allow separate skeletons to interact has become much easier. This is all thanks to Mitch!
Jump to 16:05 if you just want to see the final result: two separate skeletons using bounding boxes for hit detection. When one of the sword bounding boxes hits the dummy, the dummy skeleton plays a hit animation.