Better handling of ENUM
Dear @sterbini @fasvesta and Hannes, I now represent enums as more complex dictionaries, which are Parquet-compatible.
I also added a simple script to "test" the different data types (see pyjapcscout/tests/test_dataCreation.py). The "roundtrip" seems to work for most types, but I still need to find a way to test properly the ENUMs.
If we can merge this version to master, then most of the "data acquisition" and "set" work seems to be done (but maybe there are still many bugs when it comes to really SET to the control system... to be tested.)