CLI tool to convert Docker images to ACIs

 docker2aci is a CLI binary that converts Docker images to ACI
 (https://github.com/appc/spec/blob/master/SPEC.md#app-container-image).
 It takes as input either a file generated by "docker save" or a Docker
 registry URL. It gets all the layers of a Docker image and squashes them
 into an ACI image. Optionally, it can generate one ACI for each layer,
 setting the correct dependencies.