feat(router): adds the router to the self-executing bundle.

Due to limitation of system build, the router cannot have its own sfx
bundle.

Fixes an issue with RouteConfig decorator by moving it into its own
file.

modules/angular2/router.js

@@ -10,7 +10,8 @@ export {Router} 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 {RouteConfig} from './src/router/route_config_annotation';
+export * from './src/router/route_config_annotation';
+export * from './src/router/route_config_decorator';
 
 import {Router, RootRouter} from './src/router/router';
 import {RouteRegistry} from './src/router/route_registry';