Support custom error messages

[koppen]

Given a class

class User < ActiveRecord::Base
    validates :email, email_address { message: "denied!" }
end

I would expect

user = User.new(:email => "nope")
user.valid? #=> false
user.errors[:email] #=> ["denied!"]

but I get

user.errors[:email] #=> ["er ikke gyldig"]

where "er ikke gyldig" is the default translation for the :invalid key.