Add libconflate and libvbucket

Change-Id: If3171cc7bb28d335f4540dc8fd40a6c59487a163
Reviewed-on: http://review.couchbase.org/34636
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>