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.