code: def get_media_timestamp(self):
          
          from burlap.common import get_last_modified_timestamp
          data = 0
          for path in self.sync_media(iter_local_paths=1):
              data = min(data, get_last_modified_timestamp(path) or data)
          #TODO:hash media names and content
          if self.verbose:
              print('date:', data)
          return data
docs: Called after a deployment to record any data necessary to detect changes
          for a future deployment.