Update ubuntu for the same "apt" and "gnupg" vulns
Merge pull request #200 from tianon/ubuntu

Update ubuntu for the same "apt" and "gnupg" vulns
Add updated ubuntu-debootstrap builds
Merge pull request #201 from tianon/ubuntu-debootstrap

Add updated ubuntu-debootstrap builds
Update default repo URL and docker-py dep to 0.5.0
Merge pull request #202 from infosiftr/minor-updates

Update default repo URL and docker-py dep to 0.5.0
Update debian:sid and debian:unstable to fix https://github.com/tianon/docker-brew-debian/issues/9
Merge pull request #205 from tianon/debian

Update debian:sid and debian:unstable...