Add the Scorm2004::Sequencing::DeliveryControls module.
Add the Scorm2004::Sequencing::Cam module.

This module only defines the namespace.
Add the Scorm2004::Sequencing::Cam::Sequencing module.

This module handles a sequencing collection.
Redefine the Scorm2004::Sequencing::Objective.new method.

This method takes three paramaters:

* activity
* objective
* state
Add the Scorm2004::Sequencing::Objectives module.

This module will be included in the Activity class, and provides the
following methods:

* rolled_up_objective
* objectives