Update to 3.18

Requires PackageKit 1.0 (bug 1470655)

Hey there :)
You will need DEP-11 data for GNOME Software to function correctly (in theory, AppInstall data is supported, but we didn't test a lot with it and it looks rather disappointing). I am almost done with creating something reusable out of the GSoC work done in 2014, which Ubuntu could use as well.

Preliminary code is at https://github.com/ximion/dep11
Some metadata can be found at http://packages.tanglu.org/source/chromodoris/appstream-data (a few issues with the metadata generator still exist, which were solved in the DAK-integrated code but need to be reworked for the split-out version. This especially concerns icon-finding.)

At Debian, the metadata will be extracted on a dedicated machine, and then be synced into the archive from where Apt will download it, ensuring always and automatically up2date metadata.
(Details to be discussed at Debconf).

Cheers,
    Matthias

P.S: Having PK 1.0 in Ubuntu would be great!

Now have 3.19.5+git in universe. Will be 3.20 by 16.04 release.