Updated contributors
Respond to private messages
Use specific node-flowdock branch for integration testing
Fixed typo in package.json
Fixed flow/private message detection in response
Use upcoming version of node-flowdock (introduces breaking API changes)
Use @robot.brain.userForId instead of the deprecated function
Compatibility with older Hubots (<2.5.0)
Fixed typo
Merge pull request #26 from flowdock/support-private-conversations

Support private conversations