- consistent 'filename' entries, at least as far as possible
- GIFs and SWFs don't have a <title>_by_<artist>_<id> anywhere in
their metadata
- Generating <id> (from 'deviationid'?) might be something that needs
to be figured out, so we can build those filenames ourselves
- better code structure etc.
- tests for videos, archives, and flash animations