css transitions + horizontal swipe gesture live tracking

1. using CSS3 transform: instead of left: for graphics accelerated animations on mobile devices
2. CSS hack (backface-visibility, -webkit-backface-visibility) to prevent flicker
3. horizontal swipe gesture live tracking.
4. if the user begins to swipe but then flicks back, the gesture is cancelled.

see this in action on http://proto.dheera.net/swipebox/