title: Color in status bar with React Native and react-navigation
body: <p>I am using <code>react-navigation</code> in React Native and I have changed the header color with</p>
  
  <pre><code>const MyScreenNavigator = StackNavigator({
    ...
  }, {
    navigationOptions: {
      headerStyle: {
        backgroundColor: 'blue',
      },
      headerTintColor: 'white'
    }
  });
  </code></pre>
  
  <p>It does change the background color of both header and status bar, but the font color is still black in the status bar.</p>
  
  <p>How can I customise the font color of the status bar?</p>