code: def setup(self):
          
          decompress_dir('.')
  
          if self.backup:
              for f in FEFF_INPUT_FILES:
                  shutil.copy(f, "{}.orig".format(f))
  
              for f in FEFF_BACKUP_FILES:
                  if os.path.isfile(f):
                      shutil.copy(f, "{}.orig".format(f))
docs: Performs initial setup for FeffJob, do backing up.
          Returns: