changes naming convention of seismogram output files to **network**.**station**...

seismogram output files and adjoint source files adopt to the new naming convention now: **network**.**station**

note that the format in file STATIONS remains the same: it first lists the station name, then network like e.g. "X20 DB 67000.00 22732.14 0.0 0.0". also seismic unix output files use the same (old) ordering.