This is a bug in catalogd. We should not require `relatedImages` to be populated. In fact, I would argue that `[{}]` is more invalid because it is saying "here's a related image. it's image is `""` and it's name is `""`.

[stevekuznetsov]

 This is a bug in catalogd. We should not require `relatedImages` to be populated. In fact, I would argue that `[{}]` is more invalid because it is saying "here's a related image. it's image is `""` and it's name is `""`.

Originally posted by @joelanford in #250 (comment)