include the announce-mail description into the rather bleak README
include the announce-mail description into the rather bleak README

andrewray/iocaml,andrewray/iocaml,douglas-larocca/iocaml,andrewray/iocaml,douglas-larocca/iocaml,andrewray/iocaml,douglas-larocca/iocaml,douglas-larocca/iocaml