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

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

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 12/01/2018: IO: add ZTOP field for model top (useful for mesh description in CF convention)

* NLFINPRAR in TFILEDATA type is now of KIND=LFI_INT
* use TPFILE as argument instead of its fields for FMOPEN_ll and FMCLOSE_ll

+ FMOPEN_ll/FMCLOSE_ll are now private
+ cleaning of comments

* use new file structure for CLUOUT and CLUOUT0 (->TLUOUT and TLUOUT0)
* use PRINT_MSG with NVERB_FATAL to replace (some) "callabortstop"
* set TFILE_OUTPUTLISTING  to select file for outputs of PRINT_MSG
* removed some unused code

* added OUTPUTLISTING CTYPE for files (IO_FILE_OPEN_ll and IO_FILE_ADD2LIST)
* added NLU variable in TFILEDATA datatype
* removed HFIPRI argument in IO_FILE_OPEN_ll, FMOPEN_ll, IO_FILE_CLOSE_ll
  and FMCLOS_ll subroutines
* removed FM_ERR subroutine
* KRESP return code is now optional for IO_FILE_OPEN_ll, FMOPEN_ll,
  IO_FILE_CLOSE_ll and FMCLOS_ll subroutines

* CINIFILE/CINIFILEPGD: default values now set in modd_lunitn
* CLUOUT and COUTFILE: initialised in modd_lunitn
* simplified some manipulations of CINIFILE

+ removed unused variables

Philippe 18/08/2017: IO: use IO_READ_FIELD for several fields, IO_FILE_OPEN and IO_FILE_CLOSE for several files

* added IO_FILE_ADD2LIST subroutine and use it
* IO_FILE_OPEN now requires the file to be in the file list
* IO_FILE_FIND_BYNAME: added optional argument useful when checking
  that a file does not yet exist
  + bug correction when filelist is empty
* added IO_FILE_PRINT_LIST subroutine (only for debugging)
* added TPTR2FILE structure to allow construction of arrays of
  pointers to files
* use IO_READ_FIELD for some 3D float arrays (in read_field.f90)
* OPEN_ll: added UPDATE_METADATA internal subroutines to treat file metadata

* OPEN_ll: added optional argument TPFILE (used for the moment for IO_ZSPLIT case)
* INI_MODEL_n: add TDIAFILE in file list

* added IO_READ_FIELD_BYNAME_X0/X2/T0 and IO_READ_FIELD_BYFIELD_X0/X2/T0 subroutines
  to IO_READ_FIELD procedure
* added IO_READ_FIELD_LFI_X0/X2/T0 subroutines to IO_READ_FIELD_LFI procedure
* added IO_READ_FIELD_NC4_X0/X2/T0 subroutines to IO_READ_FIELD_NC4 procedure
* use IO_READ_FIELD in SET_GRID

* added IO_READ_FIELD_BYNAME_X1 and IO_READ_FIELD_BYFIELD_X1 subroutines
  to IO_READ_FIELD procedure
* added IO_READ_FIELD_LFI_X1 subroutine to IO_READ_FIELD_LFI procedure
* added IO_READ_FIELD_NC4_X1 subroutine to IO_READ_FIELD_NC4 procedure
* bug corrections in IO_READ_CHECK_FIELD_ATTR_NC4
* use IO_READ_FIELD in INI_MODEL_n

Philippe 25/04/2017: bug correction: allocate xxx_MAX arrays if LMEAN_FIELD + initialize them to lowest possible value

(cherry picked from commit 2528125a)

Philippe 25/04/2017: bug correction: allocate xxx_MAX arrays if LMEAN_FIELD + initialize them to lowest possible value

(cherry picked from commit 2528125a)