Add an option for "remote" in location dropdown

[Lontronix]

currently it is not possible to add companies that are entirely remote and therefore do not have a physical location

[devinmatte]

Technically every business needs a headquarters "location", but yeah, we don't really care if they're fully remote

[geoffmoss0]

Since every company has to register with a physical address legally, I'd say we're well within our right to require one for the site