message: Add example of chanigng title tint color  to zoom sample
diff: @@ -7,7 +7,7 @@ export default ({colors, color}) => (
  <NavigationContext.Consumer>
  {({stateNavigator}) => (
  <ScrollView contentInsetAdjustmentBehavior="automatic">
  - <NavigationBarIOS title="Color">
  + <NavigationBarIOS style={{color: color}} title="Color">
  <RightBarIOS>
  <BarButtonIOS systemItem="cancel" onPress={() => {
  stateNavigator.navigateBack(1);
  