refactor(jqLite): simplify jqLiteAddNodes when multiple nodes are being added

This branch is not as hot as the single node branch and the slice that we need for old webkit/phantom makes for loop preferable.

Author: IgorMinar

src/jqLite.js

@@ -400,11 +400,9 @@ function jqLiteAddNodes(root, elements) {
       // if an Array or NodeList and not a Window
       if (typeof length === 'number' && elements.window !== elements) {
         if (length) {
-          if (elements.item) {
-            // convert NodeList to an Array to make PhantomJS 1.x happy
-            elements = slice.call(elements);
+          for (var i = 0; i < length; i++) {
+            root[root.length++] = elements[i];
           }
-          push.apply(root, elements);
         }
       } else {
         root[root.length++] = elements;