feat(router): auxiliary routes

Closes #2775

modules/angular2/router.ts

@@ -19,7 +19,8 @@ export * from './src/router/route_config_decorator';
 export * from './src/router/route_definition';
 export {OnActivate, OnDeactivate, OnReuse, CanDeactivate, CanReuse} from './src/router/interfaces';
 export {CanActivate} from './src/router/lifecycle_annotations';
-export {Instruction} from './src/router/instruction';
+export {Instruction, ComponentInstruction} from './src/router/instruction';
+export {Url} from './src/router/url_parser';
 
 import {LocationStrategy} from './src/router/location_strategy';
 import {HTML5LocationStrategy} from './src/router/html5_location_strategy';