Create `related_urls` field in category.json?

[Daniel-at-github]

I think that a related_urls field in category.json is needed for any url traversal to all the talks in an event. Examples:

• Event schedule
• Event web
• Event social media url's

This related_urls could be displayed in all talks of the event.

[jtemporal]

Yes! some events keep their website alive even after it was over. I think it is a valid event metadata to have.