Update conda packages to 3.0 and py36

[Former user]

Currently the latest packages packages on https://anaconda.org/mpi4py/mpi4py/files are from over a year ago, and there are no mpi4py 3.0 versions, and no builds for python 3.6

It would be great for the community to get those updated!

[Lisandro Dalcin]

You should really use the conda-forge mpi4py package https://anaconda.org/conda-forge/mpi4py/. All my conda packaging efforts are spent there.

Yesterday, the conda-forge admins merged a PR related to MPI metapackages, this way we will have mpi4py builds (and other MPI-based libraries) for both MPICH and Open MPI.

Once we have mpi4py builds with different backend MPI available in conda-forge, I think I'll just remove the https://anaconda.org/mpi4py organization and everything under it, just to prevent future confusion. Any objections to that?

[Lisandro Dalcin]

https://anaconda.org/mpi4py/ is gone for good, use packages from of https://anaconda.org/conda-forge/