Summary:
Capturing the correct attribution in the licenses as well as adding some documentation.
I think the code will have changed significantly enough across the files that once we change to flow, we can drop the attribution in the files but leave the mention in the README.
Changelog: [Internal]
bypass-github-export-checks
Reviewed By: huntie
Differential Revision: D55752899
fbshipit-source-id: b436d745d5ad439661d2af840b2cc8df4bff0038
Blake Friedman