For GPU, ice4_nucleation cannot be put in an include file
as included subroutine must not contain local variables.

REPRO48 key added in aro_adjust
PA/PB size declaration changed in ice4_tendencies (to allow bound checking)

PCOMPUTE/ZCOMPUTE replaced by logical array
Last where statement decorated with mnh_expand

Arrays declared with KPROMA size

Suppression of ZMASK (DO with IF tests)
Arrays declared with KPROMA size
WHERE statement decorated with mnh_expand directives

Suppression of ZMASK (DO with IF tests)
Arrays declared with KPROMA size
WHERE statement decorated with mnh_expand directives

Suppression of ZMASK (DO with IF tests)
Arrays declared with KPROMA size
WHERE statement decorated with mnh_expand directives

use of REPRO55 for mode_ice4_sedimentation_stat.F90 (in addition to REPRO48)

Suppression of ZMASK (DO with IF tests)
Arrays declared with KPROMA size

Suppression of ZMASK (DO with IF tests)
Arrays declared with KPROMA size

Suppression of ZMASK (DO with IF tests)
Arrays declared with KPROMA size
WHERE statement decorated with mnh_expand directives

All modd_* replaceed by structures in ICE3

modd_* modified to enable execution with ifort
Phasing of modifications to enable PRFR option

nucleation optimised
docs/TODO updated

Suppress error message in ice4_tendencies for PRFR option as
it is redundant with the message in rain_ice

Modification to reproduce old results with the PRFR option

Adaptation of mode_ice4_compute_pdf
Revisit of nucleation

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

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