Update ReactRouter

* Update to new Signature using RouterContext
* Update to new history signature using browserHistory

docs/additional_reading/react_router.md

@@ -30,7 +30,7 @@ const RouterApp = (props, location) => {
   // Important that you don't do this if you are redirecting or have an error.
   return (
     <Provider store={store}>
-      <RoutingContext {...routeProps} />
+      <RouterContext {...routeProps} />
     </Provider>
   );
 };

spec/dummy/client/app/startup/ClientRouterApp.jsx

@@ -1,12 +1,7 @@
 import React from 'react';
-import Router from 'react-router';
-import createHistory from 'history/lib/createBrowserHistory';
+import Router, { browserHistory } from 'react-router';
 import routes from '../routes/routes';
 
-export default (props) => {
-  const history = createHistory();
-
-  return (
-    <Router history={history} children={routes} {...props} />
-  );
-};
+export default (props) => (
+  <Router history={browserHistory} children={routes} {...props} />
+);

spec/dummy/client/app/startup/ServerRouterApp.jsx

@@ -1,5 +1,5 @@
 import React from 'react';
-import { match, RoutingContext } from 'react-router';
+import { match, RouterContext } from 'react-router';
 
 import routes from '../routes/routes';
 
@@ -24,6 +24,6 @@ export default (props, location) => {
 
   // Important that you don't do this if you are redirecting or have an error.
   return (
-    <RoutingContext {...routeProps} />
+    <RouterContext {...routeProps} />
   );
 };