Upon discussion with John Wiegley <johnw@newartisans.com> on #ledger on
irc.freenode.net, the following was indicated:
<johnw> bkuhn: as long as the GPL infection stays in contrib, I see no problem
with it
...
<bkuhn> ... I got the ... answer, which is "johnw will accept GPL'd stuff
in contrib/..., as long as it's careful to not cause GPL to cover
the main Ledger codebase that's not in contrib/..."
Therefore, the non-profit-audit-reports/ application will be licensed
GPLv3-or-later.