Add additonal kraken:state values

[jeffharrell]

#21 added kraken:state to the app to check for when it's in a disconnecting mode. We should add additional values listening, disconnected, and starting.

[aredridel]

listening is hard. Multiple servers can be starting up and starting to listen; when would it fire?

[jeffharrell]

This issue was filed a while back and was more of a brainstorm on the various states we could have. My brain's fuzzy on it, but if I remember correctly the idea with listening was that the server was up and available.

Since this issue hasn't had much traction if may not really need to be a priority.

[aredridel]

Yeah. Let's close for now, if we've a use-case we can re-open.