Add a custom YARD footer for Google Analytics.

yard/default/layout/html/footer.erb

@@ -0,0 +1,12 @@
+<%= superb :footer %>
+<% if ENV["ANALYTICS"] %>
+  <script type="text/javascript">
+  var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
+  document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
+  </script>
+  <script type="text/javascript">
+  try {
+  var pageTracker = _gat._getTracker("<%= ENV["ANALYTICS"] %>");
+  pageTracker._trackPageview();
+  } catch(err) {}</script>
+<% end %>