BRANCH 4.1:
  made Add Tasks to Selected run asynchronously
BRANCH 4.1:
  added dictionary support in sobject for Expression, e.g. an env_sobject
  added snapshot env_sobject to be used in notification message like @GET(snapshot.process) where the event is applicable like (checkin|...)
BRANCH 4.1:
  added better doc string for FileCheckin descibing different modes
Merge branch '4.1' of https://github.com/Southpaw-TACTIC/TACTIC into 4.1