The "all" channel fundamentally doesn't scale, because it needs
to fetch N builds from the database (where N is potentially a very
large number), then check whether they are still valid. And it's
not very useful anyway.
doesn't scale), and include links for jobset/job specific pages.
The main page now lists the projects.
* Overview pages for jobsets and jobs.
* Links to the channels.
* Jobsets are now defined and edited in a separate action.