Add ES6 import hack for 'browser'

src/libraries/navdrawer/navdrawer.js

@@ -1,6 +1,8 @@
 define(["browser", "dom", "css!./navdrawer", "scrollStyles"], function (browser, dom) {
     "use strict";
 
+    browser = browser.default || browser;
+
     return function (options) {
         function getTouches(e) {
             return e.changedTouches || e.targetTouches || e.touches;