title: TabLayout color of selected tab underline
body: <p>How can I change the color of the underline of the selected tab on the new <a href="http://developer.android.com/reference/android/support/design/widget/TabLayout.html" rel="noreferrer">TabLayout</a>? 
  The <a href="http://developer.android.com/reference/android/support/v4/view/PagerTabStrip.html" rel="noreferrer">PagerTabStrip</a> has a method <code>setTabIndicatorColor(int color)</code>, <code>TabLayout</code> doesn't seem to have such a method. </p>
  
  <p><img src="https://i.stack.imgur.com/UI37l.png" alt="enter image description here"></p>