Philippe 03/03/2021: budgets: add tbudiachrometadata type (useful to pass more information to Write_diachro)

Robert S. 02/12/2019: Cartesian coordinates allowed for stations and passive polutants (paspol). Use of LCARTESIAN instead of LATSTAT flag for multi-proc

Christine 11/10/2019: minor correction, unallocation of allocated radiation variable with CRAD=NONE for profilers and stations

 C.Lac 15/5/2018 odification in profilers/stations : SW,LW diagnostics (only downward) replaced by SWU,LWU,SWD,LWD

+ use IO_WRITE_FIELD for several fields written in diachronic files