Add Initial Music Playback, because I just feel like doing it. 😛

Put `Music.wav` to `sdmc:/3ds/Universal-Updater/`. **Warning**: The Wav File should not be larger than 13 / 14 MB, otherwise it will crash.

include/utils/sound.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <3ds.h>
+#include <string>
+
+class sound
+{
+public:
+	sound(const std::string& path, int channel = 1, bool toloop = true);
+	~sound();
+	void play();
+	void stop();
+
+private:
+	u32 dataSize;
+	ndspWaveBuf waveBuf;
+	u8* data = NULL;
+	int chnl;
+};