Add link logic for conpass and social media accounts

[kjaymiller]

There are obviously more sites helping to organize groups. We can't assume that everyone is using meetup.com, twitter, and Facebook.

When an organization has a link. That link should be checked against a list with the appropriate link.

Schema Change

The biggest change here is that instead of a schema line for each type there will be a link schema which is an array of links.

Backend

Dealing with this schema change will change the react view to just pull from the link value.