refactors layouts for single and list, header, footer

layouts/partials/page-single/comment/disqus.html

@@ -0,0 +1,29 @@
+<div id="disqus_thread"></div>
+<script type="text/javascript">
+    /* 
+      Check and don't inject Disqus on localhost/127.0.0.1, however, it does not
+      work for customised local domains, e.g. example.test, example.dev
+    */
+    (function () {
+    if (location.hostname === "localhost" ||
+      location.hostname === "127.0.0.1" ||
+      location.hostname === "") {
+      return;
+    }
+    var dsq = document.createElement('script');
+    dsq.type = 'text/javascript';
+    dsq.async = true;
+    var disqus_shortname = '{{ .Site.DisqusShortname }}';
+    dsq.src = '//' + 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>