CSS grammar

A helpful recursive descent parser definition for vanilla CSS. (Not Less-CSS.) So I could either just use the CSS module or roll my own. Honestly: rolling my own is attractive, but ... so is finishing things. I wouldn't think of writing my own HTML parser, after all. (I'm crazy, but not that crazy.)

Of course, I'm also not proposing switching back and forth between text and Decl in HTML definitions, as I am with CSS. So ....