fancyapps/fancyBox — pull request #946 by jariwiklund (2014-10-15 08:13:55+00:00)
Title: Added srcset support to define pixel-ratio images

This commit adds support for the srcset attribute on images, used to define pixel-ratio images.
The thumbnail is defined as per the standard: http://www.w3.org/html/wg/drafts/html/master/embedded-content.html#attr-img-srcset
Like this: