Use anchor.js to add deep links

_layouts/docs.html

@@ -69,3 +69,13 @@ layout: default
     </div>
   </div>
 </div>
+
+<script src="/assets/js/anchor.min.js"></script>
+<script type="text/javascript">
+  anchors.options = {
+    placement: 'left',
+    class: 'text-gray no-underline'
+  };
+
+  anchors.add();
+</script>