Juan 24/05/2018: COUPLING , introduce new LMNH_ISINIT variable to initialise correctly MNH with INIT_NMNH_COMM_WORLD in coupled run

Philippe 31/05/2018: IO: added TNCOORDS field to TFILEDATA to point correctly to coordinates variables

Philippe 25/05/2018: IO: detect and abort when errors at OPEN + set more precise STATUS when opening LFI file

Philippe 24/05/2018: IO: bug correction: open OUTPUTLISTING file only for processes that need to write to it

* IO_READ_CHECK_FIELD_LFI: reduce error level to warning if unexpected grid for scalar variable
* IO_FILE_OPEN_ll: missing NDIMS for MASDEV
* INI_MODEL_n: associate TINIFILEPGD to TFILE_DUMMY if necessary
* WRITE_BUDGET: set NGRID=1 for 6D MASK variables
* WRITE_DIACHRO: reverted name of field to old behavior (kept improved comment) (patch was lost in previous merge)
* PREPARE_METADATA_WRITE_SURF: keep TPFIELD fieldvalues when in conflict with passed values

Philippe 03/05/2018: IO: check if NAM_BACKUP namelist is present and that the list of valid backups is not empty

Philippe 19/04/2018: IO: add possibility to choose directory for outputs, backups and diachronic files

* REQ_TAB and T_TX2DP too small if less processes than split files
* missing broadcast if split files (deadlock if IRESP/=0)

Philippe 05/04/2018: IO: modify IO_SET_KNOWNDIMS_NC4, IO_WRITE_COORDVAR_NC4 and IO_WRITE_FIELD_ATTR_NC4 to support files from all programs

This allows to write coordinate variables in all files and with all programs (see also next commits)

needed to manage correctly domain number when writing dimension variables

Philippe 28/03/2018: replace TEMPORAL_DIST by DATETIME_DISTANCE and ADD_FORECAST_TO_DATE and SUBTRACT_TO_DATE by DATETIME_CORRECTDATE

(LTIMEDEP is only set for some test variables)

* set JPXKRK to NLFIMAXCOMMENTLENGTH
* add NSTRINGCHUNKSIZE parameter in mode_netcdf (instead of IMULT)
* typo

Philippe 22/03/2018: IO: use CFORMAT field of TFILEDATA instead of relying on LIOCDF4, LLFIOUT and LLFIREAD
This prevents some problems when mixing LFI and netCDF files (ie in cdf2lfi)
+ cleaning use of modd_io_ll for LIOCDF4, LLFIOUT and LLFIREAD (and others)

Philippe 19/03/2018: IO: Z-split files: pass also the optional HFORMAT argument (necessary for LFI2CDF)

Philippe 13/02/2018: IO_GUESS_DIMIDS_NC4: manage variables with CLBTYPE/=NONE + add a return value + problems are now WARNING instead of FATAL