Adding an example to show debug level usage

Author: andreagilardoni

Diff for: examples/Arduino_Debug_Levels/Arduino_Debug_Levels.ino

@@ -0,0 +1,23 @@
+#define DEBUG_LEVEL DEBUG_LEVEL_INFO
+#include <Arduino_DebugUtils.h>
+
+void setup() {
+  Serial.begin(9600);
+  Debug.timestampOn();
+  Debug.debugLabelOn();
+  Debug.setDebugLevel(DBG_ALL);
+}
+
+int i = 0;
+
+void loop() {
+  DEBUG_ERROR("i = %d", i);
+  DEBUG_WARNING("i = %d", i);
+  DEBUG_INFO("i = %d", i);
+  DEBUG_DEBUG("i = %d", i);
+  DEBUG_VERBOSE("i = %d", i);
+
+  Serial.println();
+  i++;
+  delay(1000);
+}