- PanelPlot: add legendSize for XY_lines
- missing Ticks label handlers
- bug : get_data_only was always True and did not work : missing value to NaN converted the data to masked_array

change in names of parameters :
- vectors: change Lcbarlabel to Llegendlabel + change in all KTEST namelists of the PACK

Quentin 09/08/2021: Python LIB, add fontsizes customization; possibility to change the prefix figure name; add addWhite colormap for either the higher (top) or the lower (bottom) value : whiteTop flag

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

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 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