Add P2PU tracking code

_config.yml

@@ -2,6 +2,7 @@ baseurl:
 markdown: redcarpet
 permalink: /:categories/:title/
 ga_tracking_code: UA-5757664-19
+p2pu_ga_tracking_code: UA-55722824-1
 exclude: [Gemfile, Gemfile.lock, README.md]
 defaults:
   -

_includes/ga.html

@@ -4,7 +4,7 @@
   m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
   })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
 
-  ga('create', '{{site.ga_tracking_code}}', 'auto');
+  ga('create', '{{include.ga_tracking_code}}', 'auto');
   ga('send', 'pageview');
 
 </script>

_layouts/base.html

@@ -34,6 +34,9 @@
 {% include footer.html %}
 
 <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
+<script>
+  window.jQuery || document.write('<script src="{{ site.baseurl }}/js/jquery.min.js"><\/script>')
+</script>
 <script src="//netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
 <script src="{{site.baseurl}}/js/gh_link_helper.js"></script>
 <script type="text/javascript"
@@ -48,7 +51,10 @@
 </script>
 <!-- Google Analytics -->
 {% if site.ga_tracking_code %}
-	{% include ga.html %}
+	{% include ga.html ga_tracking_code=site.ga_tracking_code %}
+{% endif %}
+{% if site.p2pu_ga_tracking_code %}
+	{% include ga.html ga_tracking_code=site.p2pu_ga_tracking_code %}
 {% endif %}
 
 </body>