fix(locators): fix by.repeater finding all rows for IE

Previously, element.all(by.repeater('foo in foos')) would find non-element
nodes for ng-repeat-start elements, which could cause IEDriver to fall over
if the test tried to get text from those nodes.

lib/clientsidescripts.js

@@ -150,7 +150,9 @@ clientSideScripts.findBindings = function(binding, exactMatch, using) {
         var elem = repeatElems[i];
         while (elem.nodeType != 8 ||
             elem.nodeValue.indexOf(repeater) == -1) {
-          rows.push(elem);
+          if (elem.nodeType == 1) {
+            rows.push(elem);
+          }
           elem = elem.nextSibling;
         }
       }