Flickr TODOs

We should fetch photos with any license (to determine activity) but keep
it locally so we only display CC-licensed photos. Ditto for photos vs.
video.
Extract Flickr functionality
createLatLngArray replaced with SQL
Load CPAD as 4326
ST_Union throws topology errors
Typo
Use EPSG:3310, stop passing client, better async

Avoids topology issues and is the projection we'd want to render for
visualization purposes anyway.

Rather than passing around a single client, have each function that
accesses Postgres connect (getting clients from a pool) and clean up
after themselves.

For iterations that result in queries, use proper async to clean up the
control flow and better report errors.
Instagram initialization
Makefile golfing