mpi4py: New package, version 1.3.1
h5py: New package, version 2.3.1
mpi4py: Adhere to package description convention
h5py: Adhere to package description convention
mpi4py: Change description
h5py: Change description
Merge pull request #3938 from aherrmann/pr_mpi

Python wrappers for mpi and hdf5 (with mpi support for hdf5)