Angular 2 should work with latest rxjs (beta.2)

Used https://github.com/angular/angular/issues/7000 to get around the es6 promise / shims issues but get this:

```
ERROR in ./~/angular2/src/facade/async.js
Module not found: Error: Can't resolve 'rxjs/observable/fromPromise' in '/[projectfolder]/node_modules/angular2/src/facade'
 @ ./~/angular2/src/facade/async.js 11:20-58
```
