updated disqus script to the latest version

Views/Parts.Disqus.cshtml

@@ -1,14 +1,15 @@
 <h2>Comments</h2>
 <div id="disqus_thread"></div>
-<script type="text/javascript">
-    var disqus_shortname = '@Model.Shortname';
-    (function () {
-        var dsq = document.createElement('script');
-        dsq.type = 'text/javascript';
-        dsq.async = true;
-        dsq.src = 'http://' + disqus_shortname + '.disqus.com/embed.js';
-        (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq);
-    })();
-</script>
-<noscript>Please enable JavaScript to view the <a href="http://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript>
-<a href="http://disqus.com" class="dsq-brlink">comments powered by <span class="logo-disqus">Disqus</span></a>
+<noscript>Please enable JavaScript to view the <a href="https://disqus.com/?ref_noscript" rel="nofollow">comments powered by Disqus.</a></noscript>
+@using(Script.Foot()) { 
+    <script>
+        (function() {  
+            var d = document, s = d.createElement('script');
+            var sn = '@Model.Shortname';
+            s.src = '//' + sn + '.disqus.com/embed.js';
+
+            s.setAttribute('data-timestamp', +new Date());
+            (d.head || d.body).appendChild(s);
+        })();
+    </script>
+}