null message listener
Merge pull request #1270 from jay-hodgson/release-64

null message listener
add new Help page mappings for Mad Scientist Stu workshop
Merge pull request #1273 from jay-hodgson/develop

update markdown artifact version
Merge pull request #1272 from jay-hodgson/release-64

SWC-1838: add new Help page mappings for Mad Scientist Stu workshop
merge from release-64