Add some failing tests
Move some to_i around
Make it so that alert_after = 0 is different from alert_after > 0
Wrap lines, format strings
Merge remote-tracking branch 'origin/master' into alert_after_zero
Merge pull request #12 from Yelp/alert_after_zero

It should not fire an alert after one alert_after period, because that would be the same as alert_after = 0