Bump version to v1.0.1

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
Merge pull request #6559 from vieux/bump_v1.0.1

Bump v1.0.1
Change version to 1.0.1-dev

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
Merge pull request #6563 from vieux/merge_release_v1.0.1

Merge release v1.0.1