cf_provision clones cf release

This is a replica of
https://github.com/cloudfoundry/bosh-lite/pull/140

I keep screwing up how I'm doing the pull request, and for that I apologize.  This PR is a replacement for the PR associated with https://www.pivotaltracker.com/story/show/74733740. After many mistakes using git, I gave up and completely redid my fork, and thus needed a new PR.