Comment 5 for bug 625357

Usually KenVandine uploads the wallpapers each cycle, so assigning the bug to him; as a reminder to upload as ubuntu-wallpapers-$RELEASE

And we need an update manager task too:

<didrocks> update-manager will propose to remove it at the end of the upgrade, maybe we can special-case this?
<pitti> should be easy to do
<mvo> sure, trivial to add cleanup for this
<mvo> or avoid it