Repair docker setup / upgrade

[martinhoefling]

Docker does not provide the prebuild docker binaries (1.11.2). Instead a tarball containing a directory 'docker' containing the docker binary with executable bit already set is provided.

[rimusz]

thanks a lot @martinhoefling for this one, that missing docker binary was on my ASAP list.
i will test PR tomorrow and cut new version then.

[rimusz]

@martinhoefling could you replace curl -o ~/kube-solo/bin/docker https://get.docker.com/builds/Darwin/x86_64/docker-$DOCKER_VERSION.tgz to curl -O https://get.docker.com/builds/Darwin/x86_64/docker-$DOCKER_VERSION.tgz?
as there is no .tgz downloaded.

thanks

[rimusz]

no worries, fixed it myself