mongoid/mongoid — pull request #3380 by hbakhtiyor (2013-11-07 14:35:13+00:00)
Title: Add timestamps macros for setting up timestamps

It will be in this way
```ruby
class Product
include Mongoid::Document
field :name, type: String
field :description, type: String

timestamps
# timestamps :created
# timestamps :updated
# timestamps :short
# timestamps created: :short
# timestamps updated: :short
```

What do you think?
If you will accept I will re-factor and add specs