Merge branch 'master' into development

* master:
  safer
  while use locally, no need of ribbon

themes/daux/js/daux.js

@@ -108,10 +108,12 @@ $(function () {
     function onResize() {
         //Fix GitHub Ribbon overlapping Scrollbar
         var a = $('article');
-        if (ribbon[0] && a[0] && a[0].scrollHeight > $('.right-column').height()) {
-            ribbon[0].style.right = '16px';
-        } else {
-            ribbon[0].style.right = '';
+        if (ribbon.length && a.length) {
+            if (a[0] && a[0].scrollHeight > $('.right-column').height()) {
+                ribbon[0].style.right = '16px';
+            } else {
+                ribbon[0].style.right = '';
+            }
         }
     }
     $(window).resize(_.debounce(onResize, 100));