Merge pull request #25 from rocker-org/feature/newlittler

Feature/newlittler
update README
Merge branch 'sandbox' of github.com:rocker-org/rocker into sandbox
add potential icon for rocker-org and rocker-hub
Just a quick mock-up in inkscape. I didn't reuse the logo files of Docker in any way in making this, it's just
semicircles and squares, so I believe this does is consistent with the Docker Terms of Use, https://www.docker.com/legal/trademark_guidelines/, but ianal and haven't asked them about it.  Anyway, what do you think?
Merge branch 'master' into sandbox
Merge pull request #31 from rocker-org/feature/icon

add potential icon for rocker-org and rocker-hub
Merge branch 'sandbox' of github.com:rocker-org/rocker into sandbox
gravatar wants square images. done
minor tweaks to README.md
move ubuntu to ubuntu.deprecated
add paragraph on Debian on to README.md
Merge pull request #32 from rocker-org/sandbox

Sandbox