Add dataset download

[siccovansas]

It would be great if we can make an export of the dataset and allow visitors to download it.

[Jonakemon]

Nice! Few questions:

• If we offer good documentation for the API, is this feature still required?
• Is a JSON file good enough?
• Can we do a cron scheduled export every night and only offer the 'latest' export file? That would prevent having to do a heavy query whenever someone clicks the export button.
• Can the file be written to public downloads folder? Or do you guys use an S3 bucket or something similar for these kind of (larger) downloads?

[siccovansas]

Offering the data as JSON via a well documented API is always good. It would also be nice to offer the dataset as a CSV for people who can't use JSON/API's. The data is nested so I would break it up by creating one row for each function of a judge. So for example Aalderink would have 8 rows in the CSV. See this example CSV I made (it contains only the first 5 rows, but should make clear how I think it should look).

A daily cronjob to generate the CSV is fine! We can host it on our own server.