Merge pull request #4285 from rjackson/enable-bound-action-name-lookup

[FEATURE ember-routing-bound-action-name] Enable by default.
[FEATURE ember-routing-consistent-resources]

Adds `.index`, `.loading`, and `.error` sub-routes for resources created
even if no callback was provided.

For example:

```javascript
  App.Router.map(function() {
    this.resource("home");
  });
```

Prior to this feature `home.index` route would not be created for the above resource.