Merge pull request #215 from tjmonsi/master

Fixes breaking on iron-form when allow-redirect is on and transpiled in Babel via Webpack

iron-form.html

@@ -248,7 +248,7 @@
         if (this.allowRedirect) {
           // If we're submitting the form natively, then create a hidden element for
           // each of the values.
-          for (element in json) {
+          for (var element in json) {
             this.$.helper.appendChild(this._createHiddenElement(element, json[element]));
           }