Preliminary breadcrumbs implementation - patch

[Alexander Dymo]

> > It should be resent. An overzealous moderator probably deleted it.
>
> Hmm, an email was resent twice (from different addresses), and is still
> nowhere to be seen. Who's in position to check mailing list settings --
> maybe it bounced email from non-subscribers, or something?

Yep, Ivan should definitely subscribe to the list to avoid moderation queue.