OS-2418 Add zone completion to more commands
OS-2410: kvm support for 'imgadm create'

Also make a single '-v' be fully "verbose". Multiple levels of
verbosity was overkill.
OS-2422 ./tools/build_illumos should give a heads up that it's running nightly
OS-2423: 'imgadm create' should create images with an @final shapshot
Merge branch 'master' of git://github.com/joyent/smartos-live into ec