Slide wider than viewport

**Test case:** http://codepen.io/coreyworrell/pen/PNKyrQ

This mostly applies to when you have the `freeScroll` setting on.

You'll see there how if you have a slide that is wider than the viewport, you have to "overscroll" to see the hidden part of the slide (overscroll left for the first slide, or right for the last slide). Setting the `cellAlign` option will allow you to see the entire slide, but only the first or last (depending on if you set it as `left` or `right`).

Is it possible to allow user to scroll from the left edge of the first slide to the right edge of the last slide?

Thank you.

Start with the linked CodePen test case and reproduce the behavior with freeScroll enabled, especially when a slide is wider than the viewport. Compare the effect of cellAlign set to left and right, then trace the carousel's scrolling bounds; done means users can scroll from the left edge of the first slide to the right edge of the last slide.

Written by the indexing model from the issue text.