Update Star to send appropriate commands
This merge request rebases code from the star branch.
On top of merging with the previous StarCfg implementation, I've also added some (trivial) tests and done a bit of rearranging. I hope that it's possible to remove methods that use chipIndex from the public API (because if it's not there we don't have to think about what it means) completely, but that's a future step.
For now I've also skipped the json file, I still need to work through what that should look like.