Rails spinoffs - Apr 2006 - Sortable trees

I''ve added the sortable tree patch from Sammi to the script.aculo.us
trunk-- please help testing it!

Besides testing the sortable trees itself, reports about any side  
effects
on draggables or standard sortables are more than welcome.

Kudos to Sammi for the elaborate patch and the great new functionality
it brings to script.aculo.us!

-Thomas