Solve the issue with AMD definitions inside our code. closes auth0#172

Author: jfromaniello

standalone.js

@@ -6,11 +6,20 @@
  * Those who use browserify will install with npm and require the module,
  * the package.json file points to index.js.
  */
+
+
+//temporary disable define from AMD.
+var old_define = global.define;
+global.define = undefined;
+
 var Auth0Lock = require('./');
 
+//restore define
+global.define = old_define;
+
 // use amd or just throught to window object.
-if (typeof global.window.define == 'function' && global.window.define.amd) {
-  global.window.define('auth0-lock', function () { return Auth0Lock; });
-} else if (global.window) {
-  global.window.Auth0Lock = Auth0Lock;
+if (typeof global.define == 'function' && global.define.amd) {
+  global.define('auth0-lock', function () { return Auth0Lock; });
+} else if (global) {
+  global.Auth0Lock = Auth0Lock;
 }