Signed-off-by: Haomai Wang <haomaiwang@gmail.com>
path or "-" for stdin
(cp | copy) <src> <dest> copy src image to dest
(mv | rename) <src> <dest> rename src image to dest
+ image-meta list <image-name> image metadata list keys with values
+ image-meta get <image-name> <key> image metadata get the value associated with the key
+ image-meta set <image-name> <key> <value> image metadata set key with value
+ image-meta remove <image-name> <key> image metadata remove the key and value associated
snap ls <image-name> dump list of image snapshots
snap create <snap-name> create a snapshot
snap rollback <snap-name> rollback image to snapshot