Renamed PIN_LED_AUTO to PIN_LED_HIGH_PRESSURE.
* Reimplemented the blinking procedure:
  - Renamed PIN_LED_ON to PIN_LED_STATUS.
  - new variables: blinkingStatusTimer, blinkingHighPressureTimer, flagHighPressure.
  - new consts: VALUE_TIME_BLINKING_MANUAL, VALUE_TIME_BLINKING_AUTO, VALUE_TIME_BLINKING_HIGH_PRESSURE, VALUE_INPUT_READ_DELAY, VALUE_TIME_RELEASE_PRESSURE_STAGE.
  - renamed inputIs() to pinDigitalValueIs().
  - uncommented revertDigitalSignal.
  - Added release pressure feature in the initial case of auto-mode.
  - reimplementation of updateLeds().
  -