added net promoter score tracking javascript shim from Qualaroo

cms/templates/base.html

@@ -23,6 +23,18 @@
     <link rel="stylesheet" type="text/css" href="${static.url('css/vendor/symbolset.ss-symbolicons-block.css')}" />
     <link rel="stylesheet" type="text/css" href="${static.url('css/vendor/symbolset.ss-standard.css')}" />
 
+    <!-- start Qualaroo -->
+    <script type="text/javascript">
+        % if user.is_authenticated():
+            var _kiq = _kiq || [];
+            _kiq.push(['identify', "${ user.email }" ]);
+        % endif
+    </script>
+
+    <!-- Qualaroo for edx.org -->
+    <script type="text/javascript" src="//s3.amazonaws.com/ki.js/48221/9SN.js" async="true"></script>
+    <!-- end Qualaroo -->
+
     <%block name="header_extras"></%block>
   </head>