Increase verbosity of release notes

And nuke all of the extra contributors

Change-Id: Id548d96343cd8123897f035fa4978897b4c145ad
Reviewed-on: http://review.couchbase.org/25616
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>