rewrite of UDD importers runner

Hi, I changed the way UDD importers are executed. Previously, they were executed via cron. Now, there's a small cron-like daemon taking care of executing them. - the importers are grouped into 'pools'. only one importer of each pool can run at a given time, which should help reduce the load on

Bug#795749: Allow the user to delete email addresses

Package: tracker.debian.org Currently tracker.debian.org allows you to add new email addresses but you can't delete any of them. It would be very nice to be able to remove email addresses.