Correct the date formatter. Keep the dates in UTC.

The formatter thought the dates were in local time, so it would convert
them to UTC, putting them into the future.

o_o;
Format `updatedAt` to be relative.
Remove `liveSince`.
Connect the login button. Crossfade the login and user subviews.
Axe the button cell subclass in LoginRequiredView.
Remove some extraneous NSLogs.
fetchStreamList => fetchAuthenticatedStreamList
Add API methods for checking follows, following, and unfollowing channels.
WindowViewModel => UserViewModel.

Should’ve called it this in the first place.