Documentation bug on options reference page

[weyus]

On the options reference page (https://jquery.malsup.com/cycle/options.html), there is no mention of the "center" option which allows the user to force the slideshow images to be centered within the container. Very useful - I specifically looked for it and could not find it. I only learned of it via an external blog post.

Please add "center" to the options reference.

Thanks,
Wes