remiprev/her — pull request #218 by kritik (2014-03-07 09:57:16+00:00)
Title: Adding Active model before and after validation

We have method valid? which is requested from ActiveModel
and don't have any callback to update values before it.
For example:
```ruby
before_validation :clean_values
def clean_values
self.email = email.presence
self.phone = phone.presence
end
```