[Add] get moved item method.

[hegedustibor]

You can get the moved element with getMovedItem method.

[kolorafa]

This is a good idea, but less hassle is to just pass the element with event. Less code and less chance to miss element move when 2 elements get dragged to fast right after another. As you need to read the last change, but when you do that it might already move second item overriding that last one.

#209