====== Feature Idea - get and set panid in gateway ======
It might be convenient to be able to get/set the panid for an attached xbee right in the gateway.
Here's how it might work:
Getting the panid:
$ gateway --getpanid
Querying xbee...
1234
Setting the panid:
$ gateway --setpanid 8888
Querying xbee...
8888
TODO: describe more about this.