add google analytics

templates/layout.jade

@@ -34,3 +34,14 @@ html(lang='en')
             p © #{ new Date().getFullYear() } #{ locals.owner } — powered by 
               a(href='https://github.com/jnordberg/wintersmith') Wintersmith
               //- please leave the "powered by" if you use the design
+
+    script(type='text/javascript').
+      var _gaq = _gaq || [];
+      _gaq.push(['_setAccount', 'UA-34513423-1']);
+      _gaq.push(['_setDomainName', '.brett.is']);
+      _gaq.push(['_trackPageview']);
+      (function() {
+        var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+        ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+        var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+      })();