Pass options when resource generator invokes view generator

I noticed the Ember additions to the rails resource generator weren't fully respecting the `--javascript-engine` option, so I was getting coffescript views when I wanted javascript.

Eg
```
$ be rails g resource person name:string --javascript-engine js
      invoke  active_record
      ... (omitted)
      invoke  ember:model
      create    app/assets/javascripts/models/person.js
      invoke  ember controller and view (singular)
      create    app/assets/javascripts/views/person_view.js.coffee
      invoke  ember controller and view (plural)
      create    app/assets/javascripts/views/people_view.js.coffee
```

creates `person_view.js.coffee` and `people_view.js.coffee`. 

I fixed it by adding the ember specific `class_option`s into `resource_override.rb`, and merging in the options when the view generators are invoked. Its working now, but let me know if there's a better way to fix it and I'd be happy to update the PR