Pythonfmu

Features:

- Add `--version` option to CLI 74
- Find the class name using Regex 76
- Embed `pythonfmu` in the FMU 78

Fixes:

- GIL not released when Python code is throwing an exception 68
- Memory leak with `GetString` 70

New features:
- Add rollback feature 41
- Add reset feature 47
- Support state serialization 55

Fixes:
- FMUs generated did not handle multi-threaded applications 61
- FMU could not be used with FMPy 61

Misc:
- Add notebook example on binder 60

First version publish on pypi.org.

Support encapsulating Python script in FMU (Co-Simulation FMI 2.0 type).

The facade is built using the Python stable API. So the binaries provided for Linux and Windows 64bits should work on any Python >=3.6.