emberjs/data — pull request #574 by ppcano (2013-01-02 19:06:16+00:00)
Title: Add notDirty mapping option

Adding a notDirty property to a model property via the map API, it
allows the record property value be updated and cause the record does not
become dirty.

```js
Adapter.map(App.Person, {
firstName: { notDirty: true }
});
```

This feature can be used for example, whenever a client will not
update these model properties to the remote server, although it updates
its local copy to improve the application user experience.