Add the Scorm2004::Sequencing::LimitConditions module.

This module will be included in the activity class.
Add the Scorm2004::Sequencing::RollupCondition class.
Add the Scorm2004::Sequencing/RollupRuleDescription module.

This module will be included in the rollup rule class.
Add the Scorm2004::Sequencing::CheckChildForRollupSubprocess class.

This class has not fully implemented and needs tests.