Logging leds (#50)

* switch to new logger for folowing led devices:
LedDeviceAtmo
LedDeviceFactory
LedDeviceFadeCandy
LedDeviceHyperionUsbasp
LedDeviceLightpack-hidapi
LedDevicePiBlaster
LedDeviceWS281x
LedRs232Device

leddevice base class defines logger already as protected member _log

* migrate to new logger for led devices.
still todo:
LedDeviceWS2812b
LedDeviceWs2812SPI
LedDeviceTinkerforge
LedDeviceLightpack
LedDeviceMultiLightpack

libsrc/leddevice/LedDevicePiBlaster.h

@@ -9,7 +9,6 @@
 
 // Hyperion-Leddevice includes
 #include <leddevice/LedDevice.h>
-#include <utils/Logger.h>
 
 class LedDevicePiBlaster : public LedDevice
 {
@@ -60,6 +59,4 @@ private:
 	/// File-Pointer to the PiBlaster device
 	FILE * _fid;
 
-        /// logger instance
-        Logger* _log;
 };