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.

Merge arome rain_ice with:
- Ryad's versio: optimisation, KPROMA blocs
- Meso-NH version: subgrid precipiation
Arome aux:
- mode_ll to provide get_indice_ll
- mode_budget

Known issues:
- Bug around KPROMA blocs: results are different when used
- precipitation fraction cannot be used as long as condensation is not merged
- mode_ice4_sedimentation_momentum is still not plugged

merge AROME, Meso-NH and Ryad's version
cleaning of forgotten modi
tools.f90 added from Meso-NH package

Modifications prepared by Ryad are stored in arome/modset_Ryad
To help the merging of ice4_fast_ri, the array syntax was replaced
by a DO loop