Update piwik template

app/views/layouts/_piwik.html.haml

+<!-- Piwik -->
 :javascript
   var _paq = _paq || [];
-  _paq.push(["trackPageView"]);
-  _paq.push(["enableLinkTracking"]);
-
+  _paq.push(['trackPageView']);
+  _paq.push(['enableLinkTracking']);
   (function() {
-    var u=(("https:" == document.location.protocol) ? "https" : "http") + "://#{extra_config.piwik_url}/";
-    _paq.push(["setTrackerUrl", u+"piwik.php"]);
-    _paq.push(["setSiteId", "#{extra_config.piwik_site_id}"]);
-    var d=document, g=d.createElement("script"), s=d.getElementsByTagName("script")[0]; g.type="text/javascript";
-    g.defer=true; g.async=true; g.src=u+"piwik.js"; s.parentNode.insertBefore(g,s);
+    var u="//#{extra_config.piwik_url}/";
+    _paq.push(['setTrackerUrl', u+'piwik.php']);
+    _paq.push(['setSiteId', #{extra_config.piwik_site_id}]);
+    var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
+    g.type='text/javascript'; g.async=true; g.defer=true; g.src=u+'piwik.js'; s.parentNode.insertBefore(g,s);
   })();
+<noscript><p><img src="//#{extra_config.piwik_url}/piwik.php?idsite=#{extra_config.piwik_site_id}" style="border:0;" alt="" /></p></noscript>
+<!-- End Piwik Code -->