DCC Servo Decoder Library U3.1 ServoRelease

New in U3.1
- Optional "Release PWM" setting for each servo.
- When enabled, the PCA9685 PWM signal is stopped one second after the servo reaches its programmed position.
- This can reduce servo humming, wobbling, heat and power consumption.
- The option is disabled by default because some mechanical installations need the servo to keep holding its position.
- Existing U2.9 settings are migrated automatically. The new option remains disabled until selected.

Important
- This stops the PWM control signal. It does not physically disconnect the 5 V servo supply.
- Test the option for each turnout or mechanism before permanent use.

Requires
- ProjectUNION Core 0.3.4
- ProjectUNION DCC 0.3.2
- NmraDcc
