Fix event path for firefox

Fix Android start dragging doesn't work

Fix delayed dragging in Ios and Android

Autoscroll revamp

Allow for 'clone' to be returned if value is 'clone'

Fixed issue in toFn causing checkPull and checkPut to always be true when `value == null`

Fix deadlock when having a form with name=host

In short, this revamp allows for elements that are parents of the currently hovered element to also autoscroll.

For native DnD, it autoscrolls the parents, but does not autoscroll the hovered element, as this is handled by HTML5.

(fix) Bind context to setTimeout

Modify the onChoose event firing order to allow for getting element information before chosenClass is applied

Fix README.md list formatting

How the onChoose event is fired before the sortable-chosen style is added, it should be able to do more fine control