Upgrade Tutorial docs for angular version to 0.13.0  

This is for issue #62

The corresponding angular tutorials issue is https://github.com/angular/angular.dart.tutorial/issues/126 
which has it's own pull request for those changes.
The demo in the tutorial stay as v0.0.1. Version 0.0.2 is surprising to the reader as there is no 0.0.1 in sight.