Not totally finished because of the interface of compute_updraft_rhcj01
that is not definitive.
PDX and PDY must be passed to the routine from aro_shallow, arp_shallow
and phys_param

compute_updraft and compute_updraft_raha are OK
for compute_updraft_rhcj10: waiting for a answer from Rachel and/or Yves

+ correction mf_turb_expl.F90

Replacement of modd_mfshall in AROME by modd_param_mfshall
Merge mf_turb_expl

mode_compute_frac_ice becomes an include file which must be used
in contains section of subroutines through an #include or a fortran
INCLUDE

OCND2 included in common code (from AROME version)
OCND2 specific code moved in common/micro or arome/dead_code directories
High/Low cloud included for condensation (from Méso-NH version)
Harmonie SPP code moved outside of physics
condensation and ice_adjust optimised by Ryad
compute_frac_ice as an elemental procedure

The 3 routines are merged into mode_compute_frac_ice
using optimisation (with pointers) developped by Ryad.