Poller should not blow up if all feeds are up to date
Poller will poll, now
Store an articles date and link
Provide defaults for title/link/description
OOooh, pretty formatting.  Yes, I'm getting distracted
Feed#publish, to reduce complexity of Feed#pull
Avoid multiple tests trampling each other
ensure Article gets required
Spike can be run as an executable
Poller#start, poller now prototype-based, not closure
Have server start a poller, test it.