Ipsframework

Fix missing `services.get_config_param('SIMULATION_CONFIG_FILE')`. Code documentation updates.

Fix issue ` AttributeError: module 'importlib' has no attribute 'util'` occurring in some environments. Code cleanup and import documentation.

Change multiprocessing start method to `fork` on macOS after the default method was changed in python 3.8 and above, see [bpo-33725](https://bugs.python.org/issue33725). This was causing issues where we were getting `TypeError: cannot pickle '_thread.RLock’ object` on macOS.

Fix issue where `SimulationData.conf_file_dir` was not initialized to `None`

Fix PyPI packaging issues.

See migration guide at https://ips-framework.readthedocs.io/en/latest/user_guides/migration.html

A large number of changes since the previous _release_.
* Code reorganized
* Removed CMake install, now uses python setuptools
* Converted into a python package
* PEP8, unit testing, code coverage, continuous integration…
* All previously deprecated api were removed
* General code cleanup, removed unused code
* Only major breaking change is when writing components you can no longer do from component import Component and must do from ipsframework import Component
* Documentation updates https://ips-framework.readthedocs.io
* Published to pypi, https://pypi.org/project/ipsframework So you can now pip install ipsframework