Uuids::Base.has_uuids method added [passes]

== Addons

* Uuids::Base.has_uuids method (adds a required #uuids attribute to AR model).

== Changes

* Uuids::Base module extends ActiveSupport::Concern to allow adding class methods.
* Uuids::Base.included - now adding the #uuids attribute extracted to Uuids::Base.has_uuids method. The method should be called explicitly.
* README.rdoc updated to reflect the changes.
* the dummy Item model includes Uuids::Base to lighten specs.

== Version changes

Updated to 1.0.0-rc waiting for 3 ActiveRecord::Base class methods redefinition:
* belongs_to
* has_one
* has_many
with the <tt>by_uuid: true</tt> option.