Add import task for archived petitions
Add import task for archived petitions

This task imports petitions from a file specified by the FILE argument.
It will skip over any petitions not in a open or rejected state and
concatenates the generated rejection reason with any rejection text so
that any future updates to those reasons will not affect historical data.

alphagov/e-petitions,StatesOfJersey/e-petitions,joelanman/e-petitions,oskarpearson/e-petitions,ansonK/e-petitions,ansonK/e-petitions,oskarpearson/e-petitions,oskarpearson/e-petitions,StatesOfJersey/e-petitions,joelanman/e-petitions,StatesOfJersey/e-petitions,alphagov/e-petitions,telekomatrix/e-petitions,ansonK/e-petitions,joelanman/e-petitions,unboxed/e-petitions,unboxed/e-petitions,unboxed/e-petitions,unboxed/e-petitions,StatesOfJersey/e-petitions,telekomatrix/e-petitions,alphagov/e-petitions,telekomatrix/e-petitions,alphagov/e-petitions