Move repeated details to variables _config.yml and general cleanup

_includes/disqus.html

@@ -1,10 +1,10 @@
 <div class="disqus screen-only">
     <div id="disqus_thread"></div>
     <script type="text/javascript">
-        var disqus_shortname = 'dpb587';
+        var disqus_shortname = '{{ site.disqus }}';
         var disqus_identifier = '{{ page.id }}';
         var disqus_title = '{{ page.title|replace:"'":"\\'" }}';
-        var disqus_url = 'http://dpb587.me{{ page.url }}';
+        var disqus_url = '{{ site.absolute }}{{ page.url }}';
 
         (function() {
             var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true;
@@ -12,6 +12,4 @@
             (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>
 </div>