Streaming jhose

Hi Ben,
this does streaming replays using postgres cursors. Needs the new eventsource commit. Changed it so that an unspecified Last-Event-Id results in only new articles. To get all articles do:

curl localhost:9999/articles -H "Last-Event-ID: 0"

We should discuss trying notify support in your scrapers. Would make the polling much more efficient and would make it a lot easier to have a channel for each newspaper which would be very useful for testing SFM :-)

Cheers,
Donny.