message: Added renderScene prop
diff: -import React from 'react';
  +import React, { ReactNode } from 'react';
  import { requireNativeComponent, StyleSheet, View, TabBarIOSItem } from 'react-native';
  import { StateNavigator, Crumb, State } from 'navigation';
  import { NavigationContext } from 'navigation-react';
  import Scene from './Scene';
  import SceneBin from './SceneBin';
  -type NavigationStackProps = {stateNavigator: StateNavigator, title: (state: State, data: any) => string, crumbStyle: any, unmountStyle: any, sharedElements: any, children: React.ReactElement<TabBarIOSItem>};
  +type NavigationStackProps = {stateNavigator: StateNavigator, title: (state: State, data: any) => string, crumbStyle: any, unmountStyle: any, sharedElements: any, renderScene: (state: State, data: any) => ReactNode, children: React.ReactElement<TabBarIOSItem>};
  class NavigationStack extends React.Component<NavigationStackProps> {
  private ref: React.RefObject<View>;
  @@ -54,7 +54,7 @@ class NavigationStack extends React.Component<NavigationStackProps> {
  return {enterAnim, exitAnim, sharedElements, oldSharedElements};
  }
  render() {
  - var {stateNavigator} = this.props;
  + var {stateNavigator, title, renderScene} = this.props;
  var {url, oldUrl, crumbs, nextCrumb} = stateNavigator.stateContext;
  return (
  <NVNavigationStack
  @@ -68,7 +68,8 @@ class NavigationStack extends React.Component<NavigationStackProps> {
  <Scene
  key={crumb}
  crumb={crumb}
  - title={this.props.title} />
  + title={title}
  + renderScene={renderScene} />
  )).concat(
  <SceneBin key={this.renderMills} />
  )}
  