Update README to reflect newer namings

Change-Id: Ib7fc0d3e4ee86e51b887e5eb0f010dcd2caded3c
Reviewed-on: http://review.couchbase.org/42065
Reviewed-by: Volker Mische <volker.mische@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>