Prevent Stuck Scroller When Trying To Move Programattically

[geraldcor]

When attempting to move the scroller programatically, if manualContinuousScrolling is enabled, the scroller will not move if the scroller is at scrollLeft() == 0 initially (at the first element in the scroller). I added an initial check to see if swapping should occur before attempting to move so as to allow the continuous action to occur.

It is not perfect as this will only account for one position worth of scrolling and attempting to use a step:function during animation seems to not work because el.data("scrollWrapper").scrollLeft() does not seem to update properly after swapping so it will scroll for as many steps in the animation after scrollLeft() == 0.

Sorry for the huge amounts of commits. It has been a weird journey merging and such. A rebase was not exactly working. Hopefully this doesn't conflict.