Set date from VersionNum

Admin:
  Ensures the date is consistent for anyone who doesn't run the git-mtime.py script locally.

Version 0.38. Not tagged

cmhg/ShellCLIHdr

@@ -22,6 +22,7 @@ initialisation-code:     module_init
 finalisation-code:       module_final
 help-string:             Module_ComponentName Module_MajorVersion_CMHG Module_MinorVersion_CMHG
 title-string:            Module_ComponentName
+date-string:             Module_Date_CMHG
 swi-chunk-base-number:   ShellSWI_Base
 swi-handler-code:        module_swis
 swi-decoding-table:      Shell Create Destroy