title: Add class to custom component angular 2
body: <p>I have a <code>&lt;myComponent &gt;&lt;/myComponent&gt;</code> and I want give class to myComponent?</p>
  
  <pre><code>This doesnt worked `&lt;myComponent class="my-class"&gt;&lt;/myComponent&gt;` 
  </code></pre>
  
  <p>How can  I do that?</p>