Basic counter in Angular 2.
Updated missing url https://code.angularjs.org/2.0.0-beta.11/Rx.js to https://code.angularjs.org/2.0.0-beta.11/rx.js
https://code.angularjs.org/2.0.0-beta.11/angular2-polyfills.js
https://code.angularjs.org/tools/system.js
https://code.angularjs.org/tools/typescript.js
https://code.angularjs.org/2.0.0-beta.11/Rx.js
https://code.angularjs.org/2.0.0-beta.11/angular2.dev.js
https://code.angularjs.org/2.0.0-beta.11/http.dev.js
https://code.angularjs.org/2.0.0-beta.11/router.dev.js