This replaces "Check Battery" and adds the following info:
* Firmware version
* RTC chip type
The firmware version is #defined in Watchy.h. There might be a
way to do this that's friendlier to the library release process,
but I'll leave that up to the people who actually build the releases.
I plan to extend the About menu with some radio-related info as
I work on getting BLE pairing working with my iPhone.
* Hibernate should only be called before deep sleep
* Init should only be called once and notify the last init
* Set up init properly with 10ms reset and pulldown
* Use GxEDP2 1.4.0 library new busy callback
to trigger a lightsleep in the mean time
Saving 600ms of CPU time per update, (12mAs/minute)
That is -4mAh per day savings