tweaks to swh.model.model to support more valid inputs * Allow -1 as Content length. * Add optional 'ctime' field to Content. * Generated content with status=hidden should have a data field. * Add a get_hash helper method to Content.
tweaks to swh.model.model to support more valid inputs * Allow -1 as Content length. * Add optional 'ctime' field to Content. * Generated content with status=hidden should have a data field. * Add a get_hash helper method to Content.