When refactoring the web interfaces, series was removed.
However, we still want to show an individual Serie, which should
properly be inside it's own table - so let's add this to the template.
This revamps code quite a bit. Series handling has been moved into the
gerrit client, it also handles caching.
The Runner logic itself has been greatly simplified.
The runner logic has been moved into the runner.go, submitqueue.go is
gone.
The "per-run result object" concept has been dropped - we instead just
use annotated logs.
Also, we switched to apex/log
