Initialization of NetCDF file is done alone

 - Processor 0 does the definition of the NetCDF file alone. Creating it in parallel seemed to cause some problems, even though it is allowed by the NetCDF library.
 - Only lpr (last processor) writes the XDMF descriptor files for axisem_output.nc4. Before all processors did that at the same time, which was wrong and caused unpredictable freezes.
strain_info.dat???? should not be written by default

 - This file is useful only for debugging and several thousand of it cause trouble on parallel file systems
Some more information in comm_elem_number

 - Output is ordered by processor number (has barrier anyway)
 - Variable name may be written out, if defined
MESHER/submit.csh: support for SuperMUC

 - if first argument is "SuperMUC", a rundir has to be defined as second argument, which allows multiple runs of xmesh in parallel.
 - movemesh.csh may take two arguments, where the first is then the rundir of the queued xmesh run
SOLVER/submit.csh: Some improvements

 - jobname is produced from name of the run + PX,MZZ etc.
 - default walltime is reduced to 10 minutes
 - field for notification adress introduced