$.fn.proxyTouchEvents() now simulates mouseover/mouseout events, better

helping to make touch events compatible with more pieces of UI (in

particular, for the purposes of this change, jQuery-UI's resizable

widget). It now keeps track of what elements the user has moved their

finger over in the calculation of the events.
Touch events are only proxied if using one finger. Gestures are left

alone so that the page or browser can handle them.
This does not yet implement the mouseenter/mouseleave events, though,

which are a bit more complicated to get right.

Tested with Review Board's comment dialog, which utilizes the resizable

widget. Saw that I was able to drag the handle around, verifying that the

mouseover/mouseout events were working.