feat(router.js): export router injectables

Exporting: `RootRouter`, `RouteRegistry`, `BrowserLocation`,
`Location`,  and `Pipeline`.

Author: PatrickJS

modules/angular2/router.js

@@ -6,10 +6,14 @@
  */
 
 
-export {Router} from './src/router/router';
+export {Router, RootRouter} from './src/router/router';
 export {RouterOutlet} from './src/router/router_outlet';
 export {RouterLink} from './src/router/router_link';
 export {RouteParams} from './src/router/instruction';
+export {RouteRegistry} from './src/router/route_registry';
+export {BrowserLocation} from './src/router/browser_location';
+export {Location} from './src/router/location';
+export {Pipeline} from './src/router/pipeline';
 export * from './src/router/route_config_annotation';
 export * from './src/router/route_config_decorator';