title: How to import non amd library ember-cli
body: <p>I am using Ember-CLI and now I faced the problem of importing AmplifyJS in my project. I downloaded Amplify using Bower however the library is not in an ES6 format. Therefore, when I try to use it in my project, I simply can't import it. </p>
  
  <p>Basically I would want to do:</p>
  
  <pre><code>import Amplify from amplify;
  
  //use amplify here
  </code></pre>
  
  <p><em>Brocfile.js</em></p>
  
  <pre><code>app.import('bower_components/amplify/lib/amplify.js');
  </code></pre>
  
  <p>Since a lot of libraries are no in the ES6 format yet, my question is: "Is there a way to easily import or use ES5 librairies in ES6".</p>
  
  <p>If not, what is the recommended way of doing that in Ember?</p>