Moved Google Analytics to header so it can appear on all pages

_includes/analytics.html

@@ -0,0 +1,10 @@
+<script>
+  (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','https://www.google-analytics.com/analytics.js','ga');
+
+  ga('create', 'UA-68765210-2', 'auto');
+  ga('send', 'pageview');
+
+</script>

_output.yml

@@ -9,6 +9,8 @@ bookdown::gitbook:
         <li><a href="https://github.com/rstudio/bookdown" target="blank">Published with bookdown</a></li>
     edit:
       link: https://github.com/dgrtwo/tidy-text-mining/edit/master/%s
+  includes:
+    in_header: _includes/analytics.html
 bookdown::pdf_book:
   includes:
     in_header: preamble.tex