Make SwaggerUi UMD compatible

src/main/javascript/SwaggerUi.js

@@ -1,6 +1,6 @@
 'use strict';
 
-window.SwaggerUi = Backbone.Router.extend({
+var SwaggerUi = Backbone.Router.extend({
 
   dom_id: 'swagger_ui',
 
@@ -195,6 +195,7 @@ window.SwaggerUi = Backbone.Router.extend({
 
 });
 
+window.SwaggerUi = SwaggerUi;
 window.SwaggerUi.Views = {};
 
 // don't break backward compatibility with previous versions and warn users to upgrade their code
@@ -228,4 +229,25 @@ window.SwaggerUi.Views = {};
       console.warn(message);
     }
   }
-})();
+})();
+
+
+// UMD
+(function (root, factory) {
+    if (typeof define === 'function' && define.amd) {
+        // AMD. Register as an anonymous module.
+        define(['b'], function (b) {
+            return (root.SwaggerUi = factory(b));
+        });
+    } else if (typeof exports === 'object') {
+        // Node. Does not work with strict CommonJS, but
+        // only CommonJS-like enviroments that support module.exports,
+        // like Node.
+        module.exports = factory(require('b'));
+    } else {
+        // Browser globals
+        root.SwaggerUi = factory(root.b);
+    }
+}(this, function () {
+    return SwaggerUi;
+}));