Switched to dragStrip to control sliding.
Formatting tweaks, added setter in DragStrip for top-level ViewGroup.
Switched to generic ViewGroup reference for generality.
Refactoring.
Removed unnecessary references to hostViewGroup
Testing button behavior.
Added useful comments. Recognize click vs swipe properly.
ViewPager-centric code now. Needs refactor. Also need to be able to interrupt fakeDrag with a new key down event.
Specialized to tracking ViewPager only.