Add a `Botsbuildbots` function

A tribute to Portal 2, this function will return an infinite list of the
contents of the AUTHORS file on GitHub master (assuming requests is
installed). Except, the macro does this, the function never gets called,
it is purely there for tribute reasons.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
minor nit s/defun/defn ?