XNAT-2530: Added check for project ID as null, handled properly now.
XNAT-2562: Add a note explaining contents of DICOM scan headers.
XNAT-2541: Modify Session archiving logic to require override option when archiving data with possible corrupted files.
Fixes XNAT-2533: Change notificationEmailIds from List to a Set to avoid multiple -notify flags.
Update the macro to tell users to use commas to separate multiple emails since that is the current functionality.
XNAT-2541: Cleanup variable naming in archiving code to clarify variable usage