Please pull!

Hi!

I've merged the changes from Fiona that integrated drag&drop handling into the plugin. That is a good improvement as it makes the drag&drop implementation more convenient.

I've also made it possible for dragTarget to be a td ( not only a child of a td ) as this allows the plugin to work on a cleaner html ( no need to put a span into the td ).

dropCallback have also been made more usable as before I have found no way to retrive both the moved node and it's new parent.