message: Faded scenes in and out
diff: @@ -5,19 +5,21 @@ import {NavigationMotion} from 'navigation-react-native';
  export default ({stateNavigator}) => (
  <NavigationMotion
  startStateKey="list"
  - unmountedStyle={{}}
  - mountedStyle={{}}
  - crumbStyle={{}}
  + unmountedStyle={{opacity: 0}}
  + mountedStyle={{opacity: 1}}
  + crumbStyle={{opacity: 0}}
  style={{flex: 1}}
  + duration={500}
  stateNavigator={stateNavigator}>
  - {(style, scene, url) => (
  + {({opacity}, scene, url) => (
  <View key={url}
  style={{
  position: 'absolute',
  left: 0,
  right: 0,
  top: 0,
  - bottom: 0
  + bottom: 0,
  + opacity: opacity
  }}>
  {scene}
  </View>
  