Promise on fetch on Thorax.Collections is broken

The deferred mechanism of default Backbone is not working, see:

With Backbone.Collection:  http://jsfiddle.net/fQ4tq/

Thorax.Collection: http://jsfiddle.net/fQ4tq/1/ - Uncaught TypeError: Object #<Object> has no method 'done'

Not sure how to test this, maybe in the direction of: https://github.com/jashkenas/backbone/blob/master/test/collection.js#L1130-L1147

(I can't get `npm test` running locally, will look into that later)