visionmedia/css-stringify — pull request #23 by andreypopp (2013-11-02 22:32:36+00:00)
Title: Initial support for source map generation

This is related to #109.

Ok, this is just an initial support. I think it's time to try to get the API right, currently it adds `sourceMap` option which changes the returned value to `{code: "...", map: {...}}`.