IE10 Touch devices

[stephband]

jquery.event.move does not currently support Microsoft's Pointer Events, making a less than fluid experience on IE10 touch devices.

Pointer Events are arguably a better spec, and will eliminate the need for
some of the finger tracking code in jquery.event.move. But neither touch
nor pointer events are a proper standard yet.

I don't have a Windows tablet or phone to test on, so I can't do anything about it. Microsoft are helping WebKit implement pointer events: at that point we'll all be able to see them working and debug.

In the meantime, feel free to help out if you can by forking and patching jquery.event.move and sending a pull request.