docker load supports tar and tar.gz files
docker load supports tar and tar.gz files

Signed-off-by: Misty Stanley-Jones <b9f9ef9e00c258208ea831c64cc129eda4ac78b4@docker.com>

cpuguy83/cli,dnephin/cli,docker/cli,dnephin/cli,thaJeztah/cli,docker/cli,thaJeztah/cli,cpuguy83/cli