infiniteCarousel.js must set dimensons of created items

Currently, when new empty items are created, their dimensions are not set before the following action:

$wrapper.scrollLeft(singleWidth * visible);

Left floated empty LI elements have zero dimensions (if CSS rules are not set for them), and the result is incorrect: the first visible thumbnail slide is not the same as the slide above.
The proposed solution: set dimensions of all items before calling scrollLeft().