Included Versions:

- serialh    serial version
- mpi1h      MPI version of 1D-distribution
- mpi2h      MPI version of 2D-distribution
- mpi3h      MPI version of 3D-distribution
- xmp1h      XMP version of 1D-distribution
- xmp2rh     XMP version of 2D-distribution
- xmp3rh     XMP version of 3D-distribution

How to build and run:

1. Edit Config.env for your environment.
2. Edit the TARGET variable in Makefile to specify which version(s) to be
   executed and then make.
3. Run ./go.sh
