[openstreetmap/openstreetmap-website] Add banner for SotM 2019 (#2364)

[Tom Hughes]

It's a bit late now...

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/openstreetmap-website/pull/2364#issuecomment-526929089
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/rails-dev/attachments/20190901/5b5c140e/attachment.html>