Useful GitHub Links

Useful links:

This shows traffic to this repository including clones: https://github.com/AdvancedPhotonSource/GSAS-II/graphs/traffic

This shows how many downloads there have been for binaries and for installers: https://tooomm.github.io/github-release-stats/?username=AdvancedPhotonSource&repository=GSAS-II-buildtools