hashchange(evt) {
		_.goto(location.hash.substr(1) || 0);
	}
Keyboard navigation
				Home : First slide
				End : Last slide
				Space/Up/Right arrow : Next item/slide
				Ctrl + Space/Up/Right arrow : Next slide
				Down/Left arrow : Previous item/slide
				Ctrl + Down/Left arrow : Previous slide
				(Shift instead of Ctrl works too)