Philippe 17/03/2021: budgets: choose source terms for budgets with character strings instead of multiple integer variables

and get the trajectory data for LFI files differently

Necessary to ensure availability of chemistry scalar variables names in ini_nsv (for further developments)

Philippe 04/03/2021: budgets: set values to cname and ccomment of tzbudiachro variables + write them

Philippe 04/03/2021: budgets: reduce checks in comparison of ndimlists to prevent false error detections (if series)

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

Philippe 18/02/2021: budgets: add missing scalar variables switch (nothing to do with them for the moment)

Philippe 17/02/2021: budgets: add missing terms for budgets in lima_nucleation_procs (are already in ini_budget)

Philippe 16/02/2021: bugfix: GMASK3D_RELAX was not computed if OHORELAX_UVWTH=F and needed by other variables

(cherry picked from commit aede627c644b55ea93cd6ff8d9c57bf93060bcbc)

(cherry picked from commit 18e800b5f0188048744a5c11fdcdab84d3eaeb83)

Philippe 12/02/2021: bugfix: change STATUS for opening files containing flash information (NEW->UNKNOWN)