kubelet: move docker-related code into sub-package
Fix the logrotate cron job.
kubelet: generate keyring from .dockercfg
Merge pull request #1218 from bcwaldon/docker-auth

Authenticated docker pulls, pt. I
Merge pull request #1291 from brendandburns/logs

Fix the logrotate cron job.
FEATURE: Support privileged containers in a pod

Add a Privileged field to containers in a pod, in order to facilitate pods
performing administrative tasks such as builds via Docker-in-Docker.

Discussion: https://github.com/GoogleCloudPlatform/kubernetes/issues/391
Add a global flag to enable/disable privileged containers