added slidetransitioncallback

[jamesthebrooks]

IE doesn't respect overflow:hidden on video elements in this slider. This causes video elements to flicker and be displayed outside the slide container as the slide is being transitioned out. By allowing for a callback in this place, one possible solution is to do the following:

$('#slider').fractionslider({
  onSlideTransitionCallback: function() {
    $('#slider').find('video, .ui-video-background').fadeOut(0).delay(500).fadeIn(0);
  }
});