Posting an initiative to an existing issue

Works fine for existing issues. But if posting a new initiative to an issue created on-the-fly (i.e. an issue not already stored in models/issue.js), then issue title will be blank when the new initiatives form is displayed, after clicking "Start an initiative for this issue". Is this just an Ember Data thing that we don't have to worry about for the real app, which will use an actual model database on the server?
It seems like this can't work. You would need a route `/issues/:issue_id/initiative/new`:
```
 this.resource('issues', { path: '/issues' }, function() {
    this.resource('issue', { path: '/:issue_id' }, function() {
      this.resource('initiative', function() {
        this.route('new');
      });
    });
  });
```

But `initiative` has to inherit from the `initiatives` resource in order for the model id to be passed in createRecord in `InitiativeNewRoute`, as far as I understand (child routes do not inherit params from their parent resources). That said, you can have a look at my code in the `newinit-InitiativeNewRoute` branch (I'll send a PR)--maybe there is a way to get InitiativeNewRoute to see the model id that I am overlooking.

I also tried putting another `initiatives` resource under `issues` (i.e. instead of `initiative`as above), but it seems like you can't have the same resource defined in two different places.