Create spritesheet of logos

We can automate this with something like Glue (http://glue.readthedocs.org/en/latest/). This way rolling a new release of the included icon packs would be super simple and no CSS would have to be manually edited. We can implement as a drush make file or even as a grunt task.

For a good overview of Glue check this out:
http://blog.booking.com/automating-css-sprites-for-large-organisations.html