fix(router): export navigation extras

modules/@angular/router/src/directives/router_outlet.ts

@@ -6,13 +6,14 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {Attribute, ComponentFactory, ComponentFactoryResolver, ComponentRef, Directive, EventEmitter, NoComponentFactoryError, Output, ReflectiveInjector, ResolvedReflectiveProvider, ViewContainerRef, Injector} from '@angular/core';
+import {Attribute, ComponentFactory, ComponentFactoryResolver, ComponentRef, Directive, EventEmitter, Injector, NoComponentFactoryError, Output, ReflectiveInjector, ResolvedReflectiveProvider, ViewContainerRef} from '@angular/core';
 
 import {RouterOutletMap} from '../router_outlet_map';
 import {ActivatedRoute} from '../router_state';
 import {PRIMARY_OUTLET} from '../shared';
 
 
+
 /**
  * A router outlet is a placeholder that Angular dynamically fills based on the application's route.
  *

modules/@angular/router/src/router.ts

@@ -38,6 +38,9 @@ import {TreeNode} from './utils/tree';
 
 declare var Zone: any;
 
+/**
+ * @experimental
+ */
 export interface NavigationExtras {
   relativeTo?: ActivatedRoute;
   queryParams?: Params;