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)

Philippe 04/02/2021: budgets: bugfixes for LDRAGTREE if LIMA + small optimisations and verifications

(needed if LBU_KCP=T, LBU_ICP=F and LBU_JCP=F for CART budgets)