* added IO_WRITE_FIELD_BYNAME_X0 and IO_WRITE_FIELD_BYFIELD_X0
  to the IO_WRITE_FIELD interface
* added IO_WRITE_FIELD_LFI_X0 subroutine to the IO_WRITE_FIELD_LFI interface
* added IO_WRITE_FIELD_NC4_X0 subroutine to the IO_WRITE_FIELD_NC4 interface

* ignore variables of zero-size
* complete strings with spaces if necessary
* read correctly the strings
* typo corrections

Philippe 15/12/2016: added IO_WRITE_FIELD_BYNAME_L0 and IO_WRITE_FIELD_BYFIELD_L0 subroutines to IO_WRITE_FIELD interface

Added fields: MY_NAME, DAD_NAME, DXRATIO, DYRATIO, XOR, YOR, WT

* added TPFILE argument to IO_WRITE_FIELD_NC4
* added optional KZFILE argument to IO_WRITE_FIELD_NC4_
* provide the correct file to IO_WRITE_FIELD_NC4 if z-splitted
  file in IO_WRITE_FIELD_BYFIELD_N0
* added TFILE_IOZ array of pointer to TOUTBAK type to point
  to z-splitted files
* manage z-splitted files in IO_FILE_OPEN_ll and IO_FILE_CLOSE_ll
* manage z-splitted files in IO_PREPARE_BAKOUT_STRUCT
* created IO_FILE_FIND_BYNAME subroutine
* merged linked lists concerning output and backup files

Philippe 13/12/2016: added possibility to compress and to reduce precision for netCDF outputs + removed old (unused) references to netCDF compression

Philippe 09/12/2016: do not fail if no COMMENT found in netCDF file (they were not written anymore if empty)

                         to allow user personalized outputs

* added pointers to the data in TFIELDDATA type
 (via array of pointers (one per mesh))
* used the previous array of pointers for some fields
  -> modif of ini files for them
* added IO_WRITE_FIELDLIST subroutine to write
  a series of fields (i.e. provided for output)
* moved INI_FIELD_LIST from INITIO_ll to INIT_MNH
* added new fields to TFIELDLIST

and IO_WRITE_FIELD_BYFIELD_X2 in IO_WRITE_FIELD interface

* added COUT_VAR in the NAM_FMOUT namelist to get the list of the fields to output
* added NFIELDLIST in the TOUTBAK structure to store the list of the fields to output
* added NMNHNAMELGTMAX parameter

* added IO_WRITE_FIELD_BYNAME_C0 and IO_WRITE_FIELD_BYFIELD_C0
  subroutines to IO_WRITE_FIELD interface
* added IO_WRITE_FIELD_LFI_C0 subroutine to IO_WRITE_FIELD_LFI interface
* added IO_WRITE_FIELD_NC4_C0 subroutine to IO_WRITE_FIELD_NC4 interface
* added 4 new fields to TFIELDLIST
* added check at beginning of INI_FIELD_LIST

* added module MODE_READWRITE_LFI
* added interface IO_WRITE_FIELD_LFI inside MODE_READWRITE_LFI
* added IO_WRITE_FIELD_LFI_X2, IO_WRITE_FIELD_LFI_X3
  and IO_WRITE_FIELD_LFI_N0 subroutines to IO_WRITE_FIELD_LFI
* replaced IO calls to use IO_WRITE_FIELD_LFI/NC4 subroutines
  in the IO_WRITE_FIELD_xx subroutines
* added IO_WRITE_FIELD_NC4_X2
* bug correction for IO_WRITE_HEADER_NC4: only the owner of
  the file writes it

* created TFIELDLIST to contains the characteristics of all the fields
* it is now possible to write scalar integer with the new IO subroutines
* added field CLONGNAME to TFILEDATA type
* removed pointer to data in TFILEDATA type

* added TFIELDDATA type to describe IO fields
* added IO_WRITE_FIELD subroutine (to replace FMWRIT in the future)
* added IO_WRITE_FIELD_NC4 subroutine (to replace NCWRIT in the future)
* added IO_WRITE_FIELD_NC4 subroutine (to replace NCWRIT in the future)
* added IO_WRITE_ATTR_NC4 subroutine (to replace WRITATTR in the future)
* added IO_WRITE_HEADER_NC4 subroutine
* added LFICDF4 format for files which are LFI + NC4

* create OUTPUT files
* added IO_FILE_OPEN_ll and IO_FILE_CLOSE_ll subroutines (which call FMOPEN_ll and FMCLOSE_ll)
* FMOPEN_ll and FMCLOSE_ll: added new optional argument: TPFILE for file structure
* added NCLOSE field in TFILEDATA
* removed NLFININAR field in TFILEDATA
* bug correction: use CFORMAT field instead of CTYPE

Philippe 18/11/2016: bug correction: call IO_PREPARE_BAKOUT_STRUCT only if program is MESONH + set default values fro NBAK/OUT_NUMB to 0

Philippe 18/11/2016: KTEST: suffix for netCDF files is now .nc (instead of .nc4). This is necessary to respect CF convention.

Philippe 15/11/2016: suffix for netCDF files is now .nc (instead of .nc4). This is necessary to respect CF convention.

+ separate outputs and backups lists

Philippe 08/11/2016: moved preparation of backup file structures to a new subroutine: IO_PREPARE_BAKOUT_STRUCT

Philippe 29/09/2016: added new fields (and renamed 2 of them) to TFILEDATA datatype and began to use them

Philippe 13/09/2016: added TFILEDATA datatype to describe the characteristics of the files and begins to use it
Plus : do not write NAM_FMOUT (due to some fields not allocated anymore)

Philippe 06/09/2016: added XBAK_TIME_FREQ and XBAK_TIME_FREQ_FIRST to choose backup frequency in terms of time

Philippe 05/09/2016: added NBAK_STEP_FREQ and NBAK_STEP_FREQ_FIRST to choose backup frequency in terms of timestep
(+ corrected a small bug if no backups at all)