GNOME 3.18.0 megaupdate

[Kalev Lember]

Hi all,

GNOME 3.18.0 is going to be released this week and I'll be wrangling the
builds for Fedora. Same as with the pre-releases we've built so far, we
are still using the f23-gnome side tag in koji for preparing everything.
If you are helping with builds, please use:

  $ fedpkg build --target f23-gnome

I'll take care of submitting them all in a single bodhi update ticket
later this week.

Thanks,
Kalev