Scraper for Argentina

[shaperilio]

https://www.argentina.gob.ar/coronavirus/informe-diario

This is from the federal government. They are publishing two PDFs per day. "Vespertino" = evening, "Matutino" = morning. They're probably meeting minutes.

Pros:

• They maintain previous days' files online (but we should start caching just in case).
• Later PDFs have cases tabulated by province.

Cons:

• PDFs
• Inconsistent filenames (must parse HTML links to get PDFs)
• Additional information / data in paragraph form