message: Release announcements now only via GitHub "Watch"
diff: @@ -35,7 +35,6 @@ happen to have a fix for it,you can also send us a pull request); for
  missing features please contact us via email at
  <ospray@googlegroups.com>.
  -Join our [mailing
  -list](https://groups.google.com/forum/#!forum/ospray-announce/join) to
  -receive release announcements and major news regarding OSPRay.
  +To receive release announcements simply ["Watch" the OSPRay
  +repository](https://github.com/ospray/OSPRay) on GitHub.
  