Philippe 10/11/2017: IO: replace OPEN_ll/CLOSE_ll by IO_FILE_OPEN/CLOSE_ll for namelist and other files
+ removed some FMLOOK_ll

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

* 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

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

Philippe 25/04/2017: IO: modified SET_CONFIO_ll to help prevent confusion in variable names from 2 modules + bug correction