Can't use h5py-parallel recipe with Python 3.6

[ketch]

I'm trying to create a Python 3.6 recipe for Clawpack, but I'm getting this:

conda.exceptions.UnsatisfiableError: The following specifications were found to be in conflict:
  - h5py-parallel -> python=3.5
  - python[version='>=3.6,<3.7.0a0']
Use "conda info <package>" to see the dependencies for each package.

I guess that we should update the h5py-parallel recipe to use the latest release of h5py (2.8.0). Or perhaps there is now a conda-forge recipe for h5py that is parallel-enabled?

@dalcinl could you help me with this?