@ericvicenti/universe (#4493)

* Isolate modules for uncontainerized navigators

* Clean up prop-types

* Fix warnings and web import friendlyness

* strip a flow

* Standalone provider/consumer navigation context

* export shallowEqual as module

* address various lint

# Conflicts:
#	src/navigators/createStackNavigator.js

* Get tests to pass

src/navigators/createContainedStackNavigator.js

@@ -0,0 +1,9 @@
+import createNavigationContainer from '../createNavigationContainer';
+import createStackNavigator from './createStackNavigator';
+
+const StackNavigator = (routeConfigs, config = {}) => {
+  const navigator = createStackNavigator(routeConfigs, config);
+  return createNavigationContainer(navigator);
+};
+
+export default StackNavigator;