stylecow plugin nested-rules

Stylecow plugin to add support for nested rules.

More info:

• https://drublic.de/blog/the-css-hierarchies-module-level-3/
• http://lists.w3.org/Archives/Public/www-style/2011Jun/0022.html

You write:

body {
	p {
		color: blue;
	}
	> section {
		h1, h2 {
			color: red;

			&.green {
				color: green;
			}
		}
	}
	div, span {
		a {
			color: orange;
		}
	}
}

And stylecow converts to:

body p {
	color: blue;
}
body>section h1, body>section h2 {
	color: red;
}
body>section h1 .green, body>section h2.green {
	color: green;
}
body div a, body span a {
	color: orange;
}

More demos in the tests folder