The image spec in image/spec/v1.md is quite a bit out of date. Not only
is it missing the changes that went into 1.10 for content
addressability, but it has inaccuracies that date back further, such as
mentioning storing tarsum in the image configuration.
This commit creates image/spec/v1.1.md which brings the specification up
to date. It discusses content addressability, new fields in the image
configuration, the repository/tag grammar, and the current mechanism for
exporting an image.
Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
