v0.8.63

Changelog:
* Added Job's model 'result_each_with_compr_size' method to expose the
  progressive result file compressed size read to the callee
* Added 'ForbiddenError' exception class for HTTP error codes 403
* Added 'permission' field to Database model and made it accessible from the
  Database and Table models
* Converted the 'update_schedule' method to using POST instead of GET
* Fixed tests