enable CUDA by default if it is found. this somehow addresses #249 as we can now run CUDA-GHOST also on non-GPU machines so there is no reason not to build the CUDA stuff into it
enable CUDA by default if it is found. this somehow addresses #249 as we can now run CUDA-GHOST also on non-GPU machines so there is no reason not to build the CUDA stuff into it

RRZE-HPC/GHOST,RRZE-HPC/GHOST,RRZE-HPC/GHOST,RRZE-HPC/GHOST