message: Root: Added isBack, from and to in this.props.onTransition param
diff: @@ -117,16 +117,18 @@ export default class Root extends React.Component {
  'root-ios-animation-show-forward'
  ].indexOf(e.animationName) > -1 || e.manual) {
  const isBack = this.state.isBack;
  + const prevView = this.state.prevView;
  + const nextView = this.state.nextView;
  this.setState({
  - activeView: this.state.nextView,
  + activeView: nextView,
  prevView: null,
  nextView: null,
  - visibleViews: [this.state.nextView],
  + visibleViews: [nextView],
  transition: false,
  isBack: undefined
  }, () => {
  isBack ? this.window.scrollTo(0, this.state.scrolls[this.state.activeView]) : this.window.scrollTo(0, 0);
  - this.props.onTransition && this.props.onTransition(this.state.isBack);
  + this.props.onTransition && this.props.onTransition({ isBack, from: prevView, to: nextView });
  });
  }
  };
  