Full `media_url`

+32K per file. Negligible under `gzip`.

```
(full-media-url) % du -h stops.*
120K    stops.csv
 32K    stops.csv.gz
212K    stops.json
 32K    stops.json.gz
168K    stops.min.json
 32K    stops.min.json.gz
(full-media-url) % git co master
(master) % du -h stops.*
 88K    stops.csv
 28K    stops.csv.gz
176K    stops.json
 32K    stops.json.gz
136K    stops.min.json
 28K    stops.min.json.gz
```