Rename libs3 to libs3.md
Update libs3.md
Update libs3.md
Update libs3.md
Revert "Update libs3.md"

This reverts commit 0a3b90ff9c929357184afbae5b4f40d8a8a8201e.
Revert "Revert "Update libs3.md""

This reverts commit df81125026c0b031d7c9b092201ec1e554f60d4e.