Description

A Pebble watchface that looks like a classic aircraft altimeter but tells the
time like a watch.

Not happy with the look yet, so consider this a beta release.

The day of the month sits in a square Kollsmeter window at 3 o'clock. A hatched warning sector next to 6 o'clock lights up when the battery drops to
20% or below.

- **Colours**: dial and bezel, the 1,000' pointer, the 100' pointer, the 10,000'
  needle, and the date. Colour choices are ignored on black and white models.
- **Seconds needle duration**: `0` disables the needle, `1`-`60` seconds shows it
  after a launch, reappearance, tap or shake, and **Always** keeps it running.
- **UTC**: use UTC instead of local time for the pointers and the date.