Merge "docs: Adding Udacity link and video to Android Material design page" into mnc-docs

  <dt><a href="{@docRoot}training/material/compatibility.html">Maintaining Compatibility</a></dt>

  <dd>Learn how to maintain compatibility with platform versions earlier than Android 5.0.</dd>

</dl>

<h2>Video Training</h2>

<div class="wrap">

  <div class="cols">

    <div class="col-1of2">

      <p>If you prefer to learn through interactive video training, check out this online course

      about material design for Android developers.</p>

      <p><a href="https://www.udacity.com/course/ud862" class="button">

        Start the video course</a>

      </p>

    </div>

    <div class="col-1of2">

      <iframe width="300" height="169"

      src="//www.youtube.com/embed/eKJ3aMGM-WM?autohide=1&showinfo=0"

      frameborder="0" allowfullscreen="" style="float: right; margin: 0 0 20px 20px;"></iframe>

    </div>

  </div>

</div>