Py-control-repository

- Add ControlRepository create_environment from existing environment

- Remove git module from puppetfile
- Remove forge module from puppetfile

- Fix missing newlines between modules
- Enhance commit message on puppetfile (update version diff)
- Remove methods to set forge url in Puppetfile as deprecated. Use r10k config baseurl instead

- **BREAKING** Rename ControlRepository list_environments to get_environment_names
- fix docstring

- Add ControlRepository get_environments
- Add ControlRepository list_environments
- Add & Improve docstrings

- Fix missing puppet subdirectory
- add docstring (first part) in exposed classes