Lunar Cycles

New Functionality:

• Can enable a Lunar Cycle to dim parts of your schedule based on the current phase of the moon.
• New, compact configuration file format (w/updated examples).
• Limits increased for PWM frequencies. 16 kHz for built-in, 1.5 kHz for the PCA9685.
• Service now only runs as root on launch. It needs it to access the PWM hardware on the Pi, but can now switch to a lower-privilege user ('pi')

Maintenance:

• Updated build scripts that can produce debian/raspbian packages.
• Under the hood work along with new tests to try to keep things stable, and lay the groundwork for future features.