Philippe 12/02/2019: bugfix: variables were not always initialized + ensure a variable is always positive

Philippe 05/02/2019: ada: use intel/2018.2 (intel/2013.1 has problems with newunit) and Intel MPI environment (POE not compatible with Intel from intel/2015.2)

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

Philippe 22/01/2019: replace double precision declarations by real(kind(0.0d0)) (to allow compilation by NAG compiler)