ahawkins/chassis — pull request #9 by terlar (2014-06-19 11:30:09+00:00)
Title: Feature: Return model in persistence

Let the save method return the model to allow for cases like:

```ruby
class SaveModel
def initialize(model)
@model = model
end

def call
Model.save do |model|
model.value = 'test'
end
end
end

use_case = SaveModel.new Model.new(id: 5)
model = use_case.call
```