title: FloatingActionButton no border?
body: <p>I cannot find a way to get a FAB with no border. For example when I try:</p>
  
  <pre><code>&lt;android.support.design.widget.FloatingActionButton
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:id="@+id/fab"
      android:background="@android:color/transparent"
      android.support.design:fabSize="normal"
      android:adjustViewBounds="true"
      style="@style/Fab"/&gt;
  </code></pre>
  
  <p>I get:</p>
  
  <p><img src="https://i.stack.imgur.com/Faa9c.png" alt="Screenshot"></p>
  
  <p>Notice the border still around the FAB. I have tried adjustViewBounds="true" and android:background="@android:color/transparent" both of which are the suggested solutions for getting rid of the border on an ImageView (which FAB extends) but neither work. How can I get rid of this border?</p>
  
  <p>Note: all @style/Fab does is position the button, nothing to do with border.</p>