v1.0.2: More responsive power readings

More responsive power readings

The Power Monitor now keeps pace with fast changes in power draw. Readings
are sourced from the Mac's SMC sensor, which refreshes about once a second,
so a shift in load shows up right away instead of taking a moment to settle.

Improved

• Readings track changing load more closely. Battery discharge, charger
  input, system power, and per-port watts now update in step with the SMC
  sensor (about once a second), so they keep up when the load changes quickly.
  Across the Power Monitor, the menu bar charging watts, whatcable --monitor,
  and whatcable --dashboard.

Fixed

• Battery discharge could lag under changing load. On some Macs the
  discharge figure took longer than it should to reflect a change in draw.
  It now keeps up. Thanks to the Pro user who flagged it and helped pin down
  the cause.

On Macs that don't expose this sensor data, the readings work exactly as
before.