CBD-798: Add cbrecovery tool

Change-Id: I0f287d6c02bd383990db4ca5967b218977f94f34
Reviewed-on: http://review.couchbase.org/25454
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>
Reviewed-by: Pavel Paulau <pavel.paulau@gmail.com>