Simple change to README.md

Change-Id: Ib0b06333770ae5bd8ba055f5526a0e097c58ad56
Reviewed-on: http://www.matthewh.me/gerrit/11
Reviewed-by: Hugi Ironbeard <hugiironbeard@gmail.com>
Reviewed-by: Matthew Hoggan <mehoggan@gmail.com>
Tested-by: Matthew Hoggan <mehoggan@gmail.com>