Add AngularDart example without routing


![image](https://f.cloud.github.com/assets/9906/1698983/0f792c8c-5f75-11e3-9ac1-90fe10e65bba.png)


> AngularDart is heavily inspired by AngularJS and is supercharged for Dart. Core Angular features such as directives, data binding, and dependency injection, are all there, and they've taken advantage of Dart's features like metadata, types, and classes to feel natural for Dart developers. AngularDart is also the first version of Angular to be built on emerging web standards like Shadow DOM.

This is an implementation without routing, because there is no equivalent to the $locationProvider in angular.dart yet and we haven't settled on a good way to implement proper routing with the AngularJS app (see #733).

I split the commits up for easier review since the compiled JS is still pretty heavy.

@sethladd If you could spare some time to look over this and provide some feedback, I'd really appreciate that. This was my first time writing more than a hello world in dart. :)