Move Google Analytics script to include.

docs/_includes/ga.html

@@ -0,0 +1,9 @@
+<script type="text/javascript">
+    (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+        (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+        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', 'UA-57144786-2', 'auto');
+    ga('send', 'pageview');
+</script>

docs/_layouts/default.html

@@ -48,14 +48,6 @@
             })();
         </script>
 
-        <script type="text/javascript">
-            (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
-                (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
-                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', 'UA-57144786-2', 'auto');
-            ga('send', 'pageview');
-        </script>
+        {% include ga.html %}
     </body>
 </html>

docs/_layouts/home.html

@@ -17,14 +17,6 @@
 
         {% include footer.html %}
 
-        <script type="text/javascript">
-        (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
-            (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
-            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', 'UA-57144786-2', 'auto');
-        ga('send', 'pageview');
-        </script>
+        {% include ga.html %}
     </body>
 </html>