* applyAutoMode(): initial case - brings the solenoids into disabled status.
* MoveCylinderUntilHighPressure():
  - added high pressure flag support.
  - Replaced magic numbers with defined contants.
* applyManualMode():
  - improved high pressure protection and high pressure flag handling.
* Added DEBUB_LED_MODE.
* updateLeds():
  - Reimplemented blinking procedure for LED_STATUS in auto and manual mode, and LED_HIGH_PRESSURE too.
  - Detected that the HIGH_PRESSURE_LED goes active with the opposite signal than the LED_STATUS.
    - Added new constants: VALUE_LED_HIGH_PRESSURE_ENABLED, VALUE_LED_HIGH_PRESSURE_DISABLED.
  - Added DEBUG_LED_MODE support.
* ApplyManualMode():
  - Improved DEBUG_MODE
* applyAutoMode:
  - Commented call to delay().