docs: Installation on Mac OS X 10.6 Snow Leopard
Docker-DCO-1.1-Signed-off-by: O.S. Tezer <ostezer@gmail.com> (github: ostezer)
Merge pull request #3918 from ostezer/master

docs: Requirements And Installation on Mac OS X 10.6 Snow Leopard
Update .mailmap and AUTHORS

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)