[0.9.11] option tolerance accepts negative values
	rewrote enable/disable logic
	added (item|container)Path

[0.9.10]Fix Array.indexOf() error in IE < 9 (Dev-Speranza)
	serialize() assumes one subcontainer per item
	remove call to stopPropagation()
	Added onMousedown()

[0.9.9]	Added options tolerance and distance
	Do not modify Array.prototype (by Joakin)
	serialize respects exclude option

[0.9.8]	Added Serialization
	Added onCancel

[0.9.7]	Support iFrame and Touch events
	Better behavior if the CSS position changes