Add some mirror commands

Signed-off-by: Jon Ludlam <jonathan.ludlam@eu.citrix.com>
Merge pull request #1 from jonludlam/mirror-cmds

Add some mirror commands
Merge branch 'master' of github.com:xapi-project/sm-cli

Signed-off-by: David Scott <dave.scott@eu.citrix.com>

Conflicts:
	main.ml
Update ChangeLog

Signed-off-by: David Scott <dave.scott@eu.citrix.com>