beautification
removing unused function + beauty
removing commented function, special version for npol=4 seems not to be necessary for

performance
removing useless consistency check
starting to implement displacement only option for kernel wavefield output
produce backtrace in check()
beauty
beauty
removing unused function
preparations for dump_type displ_only
working on output for displ_only mode, not running yet
mapping to global coordinates for displacent seems to work
adding dumptpe + distance/depth filter for kernel wavefields to inparam_advanced