Quentin 07/07/2021: Python : ZTSERIES and XTSERIES need to be transposed to use psection functions without specifying .T each time + bugfix

Quentin 06/07/2021: update Python lib to read NetCDF4 groups and adapt KTEST to the new read functions + cleaning

F. Auguste, T. Nagel, R. Schoetter, V. Masson et al. (IBM and Recycling turb.) + E. Jezequel (station in namelists)
TODO: check I/O restart and CALL of write_diachro in write_stationn

Philippe 28/05/2021: IO: use IO_Mnhname_clean to ensure CF compliance of names (attributes, variables, dimensions and groups)

Philippe 27/05/2021: reduce verbosity level in IO_Field_attr_write_nc4 if no coordinates attribute (budgets do not have it yet)

Philippe 21/05/2021: budgets: merge 'Point' and 'Vertical profile' shapes for flyers in the same group level

Quentin 06/05/2021: Python lib update. Add AVION and AVIONZ time series; correction of reading from netcdf group;
read MASK variables; improve date printing; add colorbar formatlabel; remove contour label (to debug); add streamline plot

Quentin 27/04/2021: bugfix missing adaptation of read_from_group when the variable is AVEF, INIF or ENDF + bugfix of multiple reading time series files

Quentin 19/04/2021: minor python plot adapt size of png files and correction of arguments for xx and yy axes for XY lines plot

Quentin 16/04/2021: add reading of netcdf group in addition to individual variables for time series budget and TSERIES/XTSERIES/ZTSERIES

Quentin 16/04/2021: adapt visu python KTEST to display command instead of (convert + evince) for portability