Support ng-controller="MyController as my" syntax
which publishes the controller instance to the
current scope.
Also supports exporting a controller defined with route:
````javascript
angular.module('routes', [], function($routeProvider) {
$routeProvider.when('/home', {controller: 'Ctrl as home', templateUrl: '...'});
});
````
we now have two types of namespaces:
- true namespace: angular.* - used for all global apis
- virtual namespace: ng.*, ngMock.*, ... - used for all DI modules
the virual namespaces have services under the second namespace level (e.g. ng.)
and filters and directives prefixed with filter: and directive: respectively
(e.g. ng.filter:orderBy, ng.directive:ngRepeat)
this simplifies urls and makes them a lot shorter while still avoiding name collisions
