reworkcss/rework — pull request #151 by gonzalocasas (2014-03-22 18:39:08+00:00)
Title: Extend at2x to add proper background-size

Using background-size: contain doesn't work for many cases in which the size has been specified or the container has a different size.

I've extended the at2x plugin to check the actual image size, halve it and use it as background-size.