settings.ignore_url_p needs to return a string.

Previously, it returned a compiled RE object.  However, before *that*,
we returned a string.

The interface for this method hasn't really ever been hammered down, but
when that happens, sometimes the best thing to do is to defer to
tradition.
Sleep with wpull's wait_time hook.  #62.

What a charmer.
Eliminate !reqd.  #62.

Differentiating between page requisites and non-requisites using wpull's
new sleep time hook is a bit tricky -- or, at least, I can't see any
clean way to do it.

Fortunately, it doesn't really matter.
Bump pipeline version.