added Drag.abort and elementRemoved methods
proper cleanup of dragged elements
proper cleanup of dragged elements
update stopDrag function signature to take el, although the YUI adapter doesn't use it.
move start callback to be before any internal code is done.
restore jquery state machine demo to original state
add container to yui state machine demo
- remove unnecessary drop init of in place copy on drag start
- pass drop options in to in place copy init code
- ensure parent is a DOM element; it may be given as a string
- dont bother initing floating endpoint to be droppable