Changes regarding output addressing (#16)

* outputaddressing corrected

declared notifyDccAccState for backward compatibility

* version define in NmraDcc.h

* DB_PRINT introduced

Changed debug printing to a macro.
Added cv29 to CV-addresses that reset caching of myAddress

NmraDcc.h

@@ -2,7 +2,7 @@
 //
 // Model Railroading with Arduino - NmraDcc.h 
 //
-// Copyright (c) 2008 - 2105 Alex Shepherd
+// Copyright (c) 2008 - 2018 Alex Shepherd
 //
 // This source file is subject of the GNU general public license 2,
 // that is available at the world-wide-web at
@@ -49,6 +49,8 @@
 #ifndef NMRADCC_IS_IN
 #define NMRADCC_IS_IN
 
+#define NMRADCC_VERSION     200     // Version 2.0.0
+
 #define MAX_DCC_MESSAGE_LEN 6    // including XOR-Byte
 
 typedef struct
@@ -671,6 +673,9 @@ extern void    notifyCVResetFactoryDefault(void) __attribute__ ((weak));
 extern void    notifyCVAck(void) __attribute__ ((weak));
 extern void    notifyServiceMode(bool) __attribute__ ((weak));
 
+// Deprecated, only for backward compatibility with version 1.4.2. Don't use in new designs
+extern void notifyDccAccState( uint16_t Addr, uint16_t BoardAddr, uint8_t OutputAddr, uint8_t State ) __attribute__ ((weak));
+
 #if defined (__cplusplus)
 }
 #endif