message: Added shared el registration function to context
diff: @@ -12,6 +12,12 @@ class NavigationMotion extends React.Component {
  static contextTypes = {
  stateNavigator: React.PropTypes.object
  }
  + static childContextTypes = {
  + registerSharedElement: React.PropTypes.func
  + }
  + getChildContext() {
  + return {registerSharedElement: this.registerSharedElement};
  + }
  getStateNavigator() {
  return this.props.stateNavigator || this.context.stateNavigator;
  }
  @@ -27,6 +33,8 @@ class NavigationMotion extends React.Component {
  componentWillUnmount() {
  this.getStateNavigator().offNavigate(this.onNavigate);
  }
  + registerSharedElement(ref, el) {
  + }
  onNavigate(oldState, state, data) {
  this.setState(prevState => {
  var scenes = {...prevState.scenes};
  