Add WYWTPL license

This program is free software. It comes without any warranty, to
the extent permitted by applicable law. You can redistribute it
and/or modify it under the terms of the Do What You Want To Public
License, Version 3, as published by Devin Weaver. See
http://tritarget.org/wywtpl/COPYING for more details.
Add stylus support to grunt
Move css to stylus file in styles/

Because stylus is cool :sunglasses: