82 -  CSS style guide

A proposed style guide to cover CSS code commits to the jQuery projects.  Open to suggestion for rules, this pass is based on the CSS in jQuery Mobile and jQuery UI.

Based off of Issue https://github.com/jquery/contribute.jquery.org/issues/82
That makes sense. But we probably still had stupid exceptions for quotes in the JS style guide at that point. We've gotten rid of those exceptions and since we're starting from scratch with the CSS style guide, we don't have any stupid rules that we need to follow just for history's sake.