GSS hover and mouseDown selectors in Cartagen

Take a look at http://cartagen.org – the buildings now have both hover and mouseDown styles. The syntax is:

building: {
	lineWidth: 0.001,
	fillStyle: "#444",
	hover: {
		fillStyle: '#222'
	},
	mouseDown: {
		lineWidth: 4,
		strokeStyle: "red"
	}
},