Break out js to specific files

js/ga.js

@@ -0,0 +1,17 @@
+(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-81915606-4', 'auto');
+ga('send', 'pageview');
+
+function gaEvent(action) {
+    ga('send', {
+        hitType: 'event',
+        eventCategory: 'main',
+        eventAction: action
+    });
+}