* Fixes a potential deadlock; it's not safe to message likely super nodes while holding the lock.
* I think this is what @nguyenhuy is looking for :)
* Fix up CHANGELOG.md
* Align touch and tracking system in ASControlNode to UIControl
Currently the touch and tracking system of ASControlNode does not align with the system of UIControl. ASControlNode does not even consider `beginTrackingWithTouch:withEvent:` or `continueTrackingWithTouch:withEvent:`.
This commit will change the ASControlNode logic around touch event handling and tracking to align with UIControl.
* Add assertion for layer backed nodes that would like to add an action target for a control event
* Adress comments
