HDF5: updated to 1.8.12 with ictce-5.5.0
h5py: updated to 2.2.1 with ictce 5.5.0
mpi4py: new version and new download url
mpi4py: correct homepage url
HDF5: use MPI
h5py: now actually with mpi support
Merge branch 'mpi4py' into hdf5

* mpi4py:
  mpi4py: correct homepage url
  mpi4py: new version and new download url
Merge pull request #685 from wpoely86/hdf5

h5py 2.2.1 and HDF5-1.8.12 with ictce-5.5.0