move code for Twitter, Google +1 and Google Analytics to bottom of page, as inline <script> tags are always blocking page load

.themes/classic/source/_includes/head.html

@@ -26,8 +26,5 @@
   <script src="http://s3.amazonaws.com/ender-js/jeesh.min.js"></script>
   <script src="{{ root_url }}/javascripts/octopress.js" type="text/javascript"></script>
   <link href="{{ site.subscribe_rss }}" rel="alternate" title="{{site.title}}" type="application/atom+xml"/>
-  {% include google_analytics.html %}
-  {% include google_plus_one.html %}
-  {% include twitter_sharing.html %}
   {% include custom/head.html %}
 </head>

.themes/classic/source/_layouts/default.html

@@ -9,5 +9,8 @@
     </div>
   </div>
   <footer>{% include footer.html %}</footer>
+  {% include google_analytics.html %}
+  {% include google_plus_one.html %}
+  {% include twitter_sharing.html %}
 </body>
 </html>