Juan 16/04/2021: ini_budget.f90, pb with ifort -> chage type hbulist -> character(len=NBULISTMAXLEN)

Philippe 23/03/2021: budgets: add ALL, LIST_AVAIL and LIST_ALL special strings for budget source terms

Philippe 23/03/2021: budgets: CBULIST_* are now allocatable and are compacted at the end of the budget initialization

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

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

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

(cherry picked from commit d7dfd210)

Philippe 30/06/2020: budgets: bugfix for HENU source in concentration of activated nuclei C2R2/KHKO budget