Philippe 19/02/2019: IO: simplification/restructuration/cleaning of open/close subroutines (to be continued)

Philippe 07/02/2019: IO: remove OPARALLELIO argument from open and close files subroutines (nsubfiles_ioz is now determined in IO_FILE_ADD2LIST)

Philippe 04/02/2019: minor bug: remove a MPPDB_CHECK3D for XLSWM which is not allocated in some cases

Philippe 01/02/2019: ZRSMIN is now allocatable (instead of size of XRTMIN which was sometimes not allocated)

Philippe 29/01/2019: SURFEX: bug corrections + missing zero-size allocations (detected with NAG compiler)

Quentin 24/01/2019: minor correction on XCEDIS : cancellation of previous modification of XCEDIS with respect to the mixing length

Quentin 23/01/2019: modification of initialization of PM09 convection scheme at hectometric scale.The mass-flux at the surface is reduced and converge to EDKF value when resolution is meso-scale. Flag to turn on : LGZ = TRUE by default. Modifs by Rachel Honnert