Heighten security according to Mozilla Observatory.

js/piwik.js

@@ -0,0 +1,10 @@
+var _paq = _paq || [];
+_paq.push(['trackPageView']);
+_paq.push(['enableLinkTracking']);
+(function() {
+  var u="//www.bovender.de/piwik/";
+  _paq.push(['setTrackerUrl', u+'piwik.php']);
+  _paq.push(['setSiteId', 1]);
+  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);
+})();