Openprovider.py

- Improve usability of RegistryMessage (https://github.com/AntagonistHQ/openprovider.py/pull/48)

- Completed domain module API (https://github.com/AntagonistHQ/openprovider.py/pull/42, https://github.com/AntagonistHQ/openprovider.py/pull/45, https://github.com/AntagonistHQ/openprovider.py/pull/46, https://github.com/AntagonistHQ/openprovider.py/pull/47)
- Packaging improvements (https://github.com/AntagonistHQ/openprovider.py/pull/41)

- Addition error codes (https://github.com/AntagonistHQ/openprovider.py/pull/36)
- Better exception handling when the API is unavailable (https://github.com/AntagonistHQ/openprovider.py/pull/37)
- Implement extra parameters to retrieve_domain_request (https://github.com/AntagonistHQ/openprovider.py/pull/38)
- Add domain locking parameter (https://github.com/AntagonistHQ/openprovider.py/pull/39)

- Hash based logins (26)
- Passing python 3 tests (27)
- Open sourced (28 and https://github.com/AntagonistHQ/openprovider.py/commit/b5217ad01f9f0d84128051cf499e8fc19d090be1)
- Additional data parameter for registering domains (29)

- Fix deprecation warning (23)
- Add undocumented error code 358 (24, 25)

- Implement check_domain_request (22)