Shopify/batman — pull request #523 by hornairs (2012-08-16 23:21:26+00:00)
Title: Add a association validator to validate associated records

This lets you do

```coffeescript
class Product
@validate 'variants', association: true
```

and have the validation on a product fail if any of its variants are invalid.

@mattwdh @jamesmacaulay for review please!