This is a TO DO document for the Uize.Widget.Drag module.

	it should be possible to cancel drag programmatically during drag, just by setting the dragCancelled state property to true
	upon releasing, an event should be fired to allow an application to programmatically cancel drag
	scroll near borders behavior
	clicking right mouse button during drag should also cancel drag (just like hitting escape key)
	find a consistent and reliable way to implement the shield resizing (perhaps using a table at the root with width=100% and height=100% ? Then, is there something additional that has to be done to make it work in the various DOCTYPE modes so that its height is 100% even if the document is short?
	deal with unnecessary window scrollbars issue during drag in IE
	support switching in and out of SHIFT modifier mode during drag