title: right alignment for a button in ion-col
body: <p>I have this grid in my Ionic 2 application. Is there any ionic-specific attribute to make the button shown on the right side of the column (row)?</p>
  
  <pre><code>&lt;ion-grid&gt;
    &lt;ion-row&gt;
      &lt;ion-col&gt;col 1&lt;/ion-col&gt;
      &lt;ion-col&gt;col 2&lt;/ion-col&gt;
    &lt;/ion-row&gt;
    &lt;ion-row&gt;
      &lt;ion-col&gt;
        &lt;button ion-button&gt;My button&lt;/button&gt;
      &lt;/ion-col&gt;
    &lt;/ion-row&gt;
  &lt;/ion-grid&gt;
  </code></pre>