rfd 0004 'docker build' tweaks
rfd 0004 'docker build' tweaks

rmustacc/rfd,joyent/rfd,joyent/rfd,joyent/rfd,davepacheco/rfd,melloc/rfd,melloc/rfd,melloc/rfd,AnthonyMann/rfd,davepacheco/rfd,davepacheco/rfd,davepacheco/rfd,davepacheco/rfd,AnthonyMann/rfd,rmustacc/rfd,joyent/rfd