title: ionic2: how can I set my Icons as ionic icons
body: <p>I'm using Ionic2: I have my Icons and I want to set them as we set Ionic icons:</p>
  
  <pre><code>&lt;ion-icon name="cart"&gt;&lt;/ion-icon&gt;
  </code></pre>
  
  <p>what should I do to use my icons, I don't want to use online Icons I want to use my icons </p>