Call it "BSD-style license".
Add Xiaohao and link to contributors on GH.
Include whatever licenses can be found.
README.rst needs to be included after all.

setuptools 0.6.26 do not include README files unless in the MANIFEST.

This reverts commit 125cce5d538ac5ad725b44763c6a94e943abfb99.
Fixed Columbia Trustees name
BNL license text approved by Dorene.

To be merged to each diffpy package repositories.
Add BNL license text.

Merge branch 'license' from diffpy-release.
Activate link to contributors graph.