v0.3.6

Changes to the code should settle down by now.
By default sending a packet count and battery status regularly are disabled by default.

However, a startup check or interrupt is still available to indicate a low battery with radio code.
Alarm trips will now only send every ten minutes or battery status (if enabled) about twice per hour.
Of course switch interrupts send once immediately.

The goal is to save battery, avoid periodic transmission (prohibited by CFR), and avoid sending multiple packets at a time which can confuse some receivers and interfere with users that have dozens of sensors.

I think the goal now should be to test firmware with as many receivers as possible to confirm packet reliability (or not).