thoughtbot/suspenders — pull request #375 by croaky (2014-07-08 05:25:53+00:00)
Title: Remove Campfire in favor of Slack

We don't need a placeholder for Slack because we'll typically add it using the
CLI:

travis encrypt "thoughtbot:123abc" --add notifications.slack

http://blog.travis-ci.com/2014-03-13-slack-notifications/