Live feed for tweet locations as they arrive, so we can produce animated 'pings' on a map.

[wfaithfull]

This will probably need a websocket connection. I think we could do this with Flask-SocketIO. Basically, each time we process a new tweet, we would also need to publish it's lat/long to the websocket, and the new front end can then use it to display a 'ping' marker.