Remove hard-coded output paths.

These should use the constant that's already defined. They also need to
be updated for the re-arranged layout.
Fix hard-coded paths in CUDA routines.

I'm not happy with this extra macro, but at least there's only one of
them instead of hard-coded paths all over the place. Ideally, the path
would be passed along from Fortran, but I'm not sure of the code flow to
be able to do that just yet.
Merge pull request #130 from QuLogic/output-paths

Remove hard-coded output paths.
added a stop statement in src/auxiliaries/smooth_vol_data.f90 and commented out all MPI statements because they break the build system; developers should use routines in src/shared/parallel.f90 only instead of calling MPI directly
Merge pull request #131 from komatits/devel

added a stop statement in src/auxiliaries/smooth_vol_data.f90 and commen...