maccman/spine — pull request #301 by sishen (2012-05-14 08:25:24+00:00)
Title: Dirty plugin for SpineJS. 

So the model object can bind the event "change:#{field} to trigger event when the field value is changed.

By default it's off and if need this feature, the model should extend Spine.Model.Dirty.

A sample case.

```javascript
class User extends Spine.Model
@extend Spine.Model.Dirty
end
```