added link to slider scrollbar in nav

Author: Scott Jehl

demos/slider/index.html

@@ -18,6 +18,7 @@ <h4>Examples</h4>
 		<li><a href="range_vertical.html">Vertical range slider</a></li>
 		<li><a href="multiple_vertical.html">Multiple vertical sliders</a></li>
 		<li><a href="colorpicker.html">Simple colorpicker</a></li>
+		<li><a href="side_scroll.html">Simple scrollbar</a></li>
 	</ul>
 </div>