Quentin 19/02/2019: adapt the chemistry-namelist for ICARTT KTEST to the new BASIC.f90 (commit of 14/02/2019) + add MNH_MEGAN in profile_mesonh.ihm

* always set MNH_REAL (8 by default)
* MNH_REAL has to be set to 4 or 8 (and not R4 or R8)
* XYZ is slightly modified to contain ...-ARCH-RxIy-...
* pass MNH_REAL to pre-processing
* replace MNH_REALS by MNH_REAL

* HDF5 1.8.9 -> 1.8.20
* netCDF 4.1.3 -> 4.5.0
* netCDF-fortran 4.1.3 -> 4.4.4
* added libaec 0.3.2 (equivalent to szlib but without licence problems)

Some files with it are still available as they could be useful later.

Philippe 08/07/2016: it is now possible to compile the bin_tools directly with MESONH using the MNH_TOOLS key.
For the moment, only LFI2CDF is available. The executable are linked to bin_tools/