Remove the "is not None" syntax

"is not None" is not necessary when declaring a "when" conditional.
Ursula should fail early if a single playbook fails

Catch failed runs and bail out if we encounter one.
Add cryptsetup so that we can map encrypted vols

Adding cryptsetup so that we can easily add encrypted volumes and
images.
Merge pull request #182 from blueboxgroup/deploy_cleanup

Deploy cleanup