title: ember.js difference routes folder and router.js file
body: <p>I'm trying to make a project in rails and ember.js through the ember-rails gem.
  I made a <code>rails generate ember:bootstrap</code> and I'm observing the tree it created under <code>assets/javascripts</code>.</p>
  
  <p>I can't understand what is the difference between things I have to put inside the <code>routes.js</code> file at top level, and in files inside the <code>/routes</code> folder.</p>