title: Send token with every backbone sync request
body: <p>My PHP api requires a user token be submitted with every request from my front-end Backbone app to make sure the user... </p>
  
  <ol>
  <li>Is active   </li>
  <li>Has permissions to access the resource</li>
  </ol>
  
  <p>What is the easiest way to set this up in Backbone? I am guessing the only way is to overwrite Backbone.sync, but what would the code look like? CoffeeScript preferred.</p>
  
  <h2>EDIT</h2>
  
  <p>Two more things<br>
  1. I would like to redirect the user to <code>/login</code> if I get a <code>403: Access Forbidden Error</code><br>
  2. I pull the user model which includes the token from localStorage when the app is   bootstrapped<br>
  3. I have a baseModel and baseCollection which all models / collections come from  </p>