Access to record's changed attributes in the RESTAdapter

[varblob]

For payload formatting I think you want the serializer.

For the dirty thing this maybe of interest

Dirt tracking with Ember-Data - only save dirty properties

that really looks nice… I remember something that Em.Data Beta15 could track changes in relationships, but I didnt find it yet. I am not to sure if observer are the best way, still it works and is better than none.