Philippe 18/06/2021: budgets (LES): improve some names and comments + better adequacy with documentation (user guide)

Philippe 10/06/2021: budgets: ini_budget: homogeneisation of clongnames + corrections in names + simplification of some conditions

Philippe 28/05/2021: budgets: rename LES budgets to be CF compliant (without need of autocorrection)

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

Philippe 27/05/2021: budgets: bugfix in Les_diachro_common_intern: ytitle was not correct due to missing trim
and therefore budgets with hsuffixes were overwritten

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

Philippe 26/05/2021: budgets: add comments to clarify usage/choice in metadata for diachronic entries

Philippe 25/05/2021: budgets: remove group level for LES budgets (allow to group fields inside the diachronic file + reduce file size)

Philippe 21/05/2021: budgets: merge LES terms with time averaging or not and normalization or not in the same group levels

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

Philippe 20/05/2021: budgets: modify tbudiachrometadata type to better respect diachro file structure (2nd step)

Philippe 19/05/2021: budgets: modify tbudiachrometadata type to better respect diachro file structure (1st step)

Philippe 18/05/2021: budgets: group all RhodJX/Y/Z/S fields inside the same netCDF group RhodJ + keep backward compatibility for LFI files

(because it was shared between the 2 subroutines, LES is in a contain block of LES_n)

Philippe 06/05/2021: budgets: add mask information in tbudiachrometadata + transmit this information

Philippe 05/05/2021: budgets: bugfix: set correct names for LES/spectrum/time averaged variables + correct ltcompress

Philippe 29/04/2021: budgets: remove ctype field of tbudiachrometadata + small improvements in Write_diachro

Philippe 28/04/2021: budgets: add cdirection, ltcompress and lnorm fields to tbudiachrometadata type