New Added client-side Sentry logging

Using Raven.js allows logging client-side javascript errors to the
configured Sentry server.

htdocs/includes/raven-js/plugins/require.js

@@ -0,0 +1,14 @@
+/**
+ * require.js plugin
+ *
+ * Automatically wrap define/require callbacks. (Experimental)
+ */
+;(function(window, Raven) {
+'use strict';
+
+if (typeof define === 'function' && define.amd) {
+    window.define = Raven.wrap({deep: false}, define);
+    window.require = Raven.wrap({deep: false}, require);
+}
+
+}(window, window.Raven));