title: Angular Material md-menu position issue
body: <p>Im using the md-component for Angular 2 from Angular Material. I'm following the docs instructions on how to implement it but the menu opens up below the trigger.</p>
  
  <p>Here is my code</p>
  
  <pre><code>  &lt;button class="menu-button" md-icon-button [mdMenuTriggerFor]="menu"&gt;
      &lt;md-icon&gt;more_vert&lt;/md-icon&gt;
    &lt;/button&gt;
    &lt;md-menu #menu="mdMenu" class="popup-menu"&gt;
      &lt;button md-menu-item&gt;
        &lt;md-icon&gt;dialpad&lt;/md-icon&gt;
        &lt;span&gt;Menu option 1&lt;/span&gt;
      &lt;/button&gt;
      &lt;button md-menu-item disabled&gt;
        &lt;md-icon&gt;voicemail&lt;/md-icon&gt;
        &lt;span&gt;Menu option 2&lt;/span&gt;
      &lt;/button&gt;
      &lt;button md-menu-item&gt;
        &lt;md-icon&gt;notifications_off&lt;/md-icon&gt;
        &lt;span&gt;Menu option 3&lt;/span&gt;
      &lt;/button&gt;
    &lt;/md-menu&gt;
  </code></pre>
  
  <p>Is there something im missing? Thanks.</p>