MARTA realtime train API adds schedule data

It's rare that MARTA has changed the realtime train API. And this is definitely the biggest change I've seen in the decade I've been using it. A longstanding complaint I have gotten while maintaining marta.io is that it only includes active trips, or moving trains and their destination. On Friday I noticed that their new train API endpoint includes future, scheduled trips. I added some quick styling for them (faded pills, calendar icons), and am excited to give it a whirl next week!