js/libs/ember-1.5.1.js
function() {
    if (this.Router === false) { return; }
    var container = this.__container__;

    if (this.Router) {
      container.unregister('router:main');
      container.register('router:main', this.Router);
    }

    return container.lookupFactory('router:main');
  }
function() {
    if (this.Router === false) { return; }
    var container = this.__container__;

    if (this.Router) {
      container.unregister('router:main');
      container.register('router:main', this.Router);
    }

    return container.lookupFactory('router:main');
  }
If the application has not opted out of routing and has not explicitly
defined a router, supply a default router for the application author
to configure.

This allows application developers to do:

```javascript
var App = Ember.Application.create();

App.Router.map(function() {
this.resource('posts');
});
```

@private
@method defaultRouter
@return {Ember.Router} the default router