Added a version number string for flexpart version, that will also be used for SPECIES file names. TODO: update unit tests, species and readspecies (master branch?)

Code for cloud water should be correct if the total cw is stored in field clwc (old scheme) or in field qc (new scheme). Minor edits in some files.

bugfix: MPI version gave wrong wet deposition when using ECMWF cloud water fields. Cloud water in ECMWF fields now uses parameter qc, or reads clwc+ciwc. Added minmass variable as limit for terminating particles.

Added variables volume/area to netcdf output. Fixed a bug where output of dry deposition where wrong for the MPI version.

Added module gfs_mod / ecmwf_mod to allow compilation of different versions without editing source code

If the 'dates' file exists on simulation start, backup to 'dates.bak' and create new file 'dates' instead of appending to it

Added a modification so thah number of particles in simulation reported to standard output (MPI version) is exact instead of estimated

Move OH_FIELDS directory to flexpart../flexin/OH_FIELDS; this is the default location, it should be possible to offer an alternative path in the COMMAND namefile