Needs a /security, or something.

[jrgifford]

This could be added to the /about page mentioned in #13, but anyway, we need a way to contact the kandan maintainers about security stuff. Something like my email, my pgp key, @fusion94's email and his key?

1.0 since this is something that yes, it isn't critical, but it's important enough in terms of future usage of kandan outside of small groups that we should show we care about security.