- weave the throttle_state through pi_support and tracking. This should come in handy to see how many throttled Pis are out there, as well as if it is correllated with canceled prints.
- upgraded disclosure of tracking information so it shows as INFO-level in the logs and all the information is dumped. If tracking.octoprint.org gets it, I should have it too :)

- add a way to get the raw value only from throttle state (glad I already plumbed it into the object!)
- add warning about not sending uuid, modify the log entry too