message: Stored scene directly against url
  Only needed it as element when scene data was also stored
diff: @@ -37,8 +37,7 @@ class NavigationMotion extends React.Component {
  var scenes = {...prevScenes};
  var stateNavigator = this.getStateNavigator();
  var {url} = stateNavigator.stateContext;
  - var element = <Scene stateNavigator={stateNavigator}>{state.renderScene(data)}</Scene>;
  - scenes[url] = {...scenes[url], element};
  + scenes[url] = <Scene stateNavigator={stateNavigator}>{state.renderScene(data)}</Scene>;
  return {scenes, rest: false};
  });
  }
  @@ -102,7 +101,7 @@ class NavigationMotion extends React.Component {
  {tweenStyles => (
  <div style={style}>
  {tweenStyles.map(({key, data: {scene, state, data, url}, style: tweenStyle}) => (
  - children(tweenStyle, scene && scene.element, key, state, data)
  + children(tweenStyle, scene, key, state, data)
  ))}
  {sharedElementMotion && sharedElementMotion({
  sharedElements: !this.state.rest ? this.getSharedElements() : [],
  