Support zipfile ingestion

[ericflo]

Many websites and services offer archive downloads where you can get a copy of your data, usually for regulatory reasons, but sometimes for customer satisfaction.

Mediasummon can't integrate with every website and service, but by implementing the ability to ingest a zip file, many of those services would be de facto supported. This would also help in situations where the API doesn't go far enough back, or when the service limits the number of requests it will respond to.