Python-chain

Fixed

- Fixed some bugs regarding PyPi integration.

Fixed

- Integrated with PyPi and tested the deployment.

Added

- Created basic project docs (`README`, `CONTRIBUTING`, `LICENSE` and `CHANGELOG`).
- Installed basic project testing frameworks (`behave` and `pytest`).
- Created the project folder architecture.
- Developed the State domain.
- Developed the Context domain.
- Developed the Chain domain.
- Developed the entrypoint.