Support both Pan or LongPress gesture. Support hook up gestures from any UIView in your UITableViewCell.

Modify the gesture handling to support both Pan or LongPress.
Modify the gesture to support binding to any UIView. It is handy to hook up an UIView in your cell.
Add missing framework in the sample project.
Modify the example project to fit the new way to setup the gestures.
Fix the position calculation of dragging view.