Update cmi5_coursestructure.md

Changes to course structure to add MasteryScore, MoveOn, LaunchMehod, and  AuthenticationMethod as per previous meetings.
Write-up of "Waived" verb and Reason extension
Merge pull request #49 from cawerkenthin/patch-1

Write-up of "Waived" verb and Reason extension
Update cmi5_runtime.md

Received Waivers per Aug 30 meeting