minor
minor
minor
minor
reordered flux computation, maybe use 2 data sets on GPU
minor
no update on GPU works
some clean up
corrected GPU allocation summary message
Implemented 3 execution streams and 2 GPU buffers

Further improvement must be achieved on the CPU side.  The compute pipeline on
the GPU can not be kept fully busy at the time
refined restart, some more verbosity
use -nsteps with relative step number (only relevant if restarted)