Clean-up and add fixed welcome jingle

.gitignore

@@ -29,3 +29,6 @@ Temporary Items
 
 # TonUINO
 /tools/*.pyc
+
+# Eclipse IDE
+.project

Logging.h

@@ -0,0 +1,42 @@
+#ifndef LOGGING_H
+#define LOGGING_H
+
+#include <SoftwareSerial.h>
+
+/*
+ * Global serial device.
+ */
+SoftwareSerial mySoftwareSerial(2, 3); // RX, TX
+
+/**
+ * Global serial device.
+ */
+void log_buffer(byte * buffer, byte bufferSize);
+
+/**
+ * Logging macros.
+ */
+#if defined(DEBUG_VERBOSE)
+#  define DEBUG_VERBOSE_PRINTLN(x) Serial.println(x)
+#  define DEBUG_VERBOSE_PRINT(x)   Serial.print(x)
+#  define DEBUG_PRINTLN(x)         Serial.println(x)
+#  define DEBUG_PRINT(x)           Serial.print(x)
+#  define DEBUG_PRINTI(x, b)       Serial.print(x, b)
+#  define DEBUG_PRINTB(b, l)       log_buffer(b, l)
+#elif defined(DEBUG)
+#  define DEBUG_VERBOSE_PRINTLN(x)
+#  define DEBUG_VERBOSE_PRINT(x)
+#  define DEBUG_PRINTLN(x)      Serial.println(x)
+#  define DEBUG_PRINT(x)        Serial.print(x)
+#  define DEBUG_PRINTI(x, b)    Serial.print(x, b)
+#  define DEBUG_PRINTB(b, l)    log_buffer(b, l)
+#else
+#  define DEBUG_VERBOSE_PRINTLN(x)
+#  define DEBUG_VERBOSE_PRINT(x)
+#  define DEBUG_PRINTLN(x)
+#  define DEBUG_PRINT(x)
+#  define DEBUG_PRINTI(x, b)
+#  define DEBUG_PRINTB(b, l)
+#endif
+
+#endif

Logging.ino

@@ -0,0 +1,11 @@
+#include "Logging.h"
+
+/*
+ * Helper routine to dump a byte array as hex values to serial.
+*/
+void log_buffer(byte * buffer, byte bufferSize) {
+  for (byte i = 0; i < bufferSize; i++) {
+	  Serial.print(buffer[i] < 0x10 ? " 0" : " ");
+	  Serial.print(buffer[i], HEX);
+  }
+}