title: making backbone models & collections available globally using requireJS
body: <p>i am a newbie to web application development. i have a backbone model named LoginModel. I want to create an object of it  and make it globally accessible from any Backbone View which will be loaded dynamically. Here is my model..</p>
  
  <pre><code>define(['underscore', 'backbone'], function(_, Backbone) {
      LoginModel = Backbone.Model.extend({
          initialize: function(){ },
          defaults:{
              userName: 'undefined',
              userID: 'undefined'
          },
          urlRoot: 'https://xxxx.xx.xxxxxx',
          parse: function(response, options){
              return{
                  userName: response.userName,
                  userId:response.userId
              };
          }
      });
  });
  </code></pre>