Merge branch 'sound' into test

gframe/sound_manager.cpp

 #include "sound_manager.h"
+#ifndef _WIN32
+#include <dirent.h>
+#endif
 
 namespace ygo {
 
@@ -14,7 +17,6 @@ bool SoundManager::Init() {
 		return false;
 	} else {
 #ifdef IRRKLANG_STATIC
-		irrklang::ikpMP3Init(engineSound);
 		irrklang::ikpMP3Init(engineMusic);
 #endif
 		return true;
@@ -49,13 +51,14 @@ void SoundManager::RefershBGMDir(std::wstring path, int scene) {
 	} while(FindNextFileW(fh, &fdataw));
 	FindClose(fh);
 #else
+	// not fully implemented
 	DIR * dir;
 	struct dirent * dirp;
-	if((dir = opendir("./sound/BGM/*.mp3")) == NULL)
+	if((dir = opendir("./sound/BGM/*.ogg")) == NULL)
 		return;
 	while((dirp = readdir(dir)) != NULL) {
 		size_t len = strlen(dirp->d_name);
-		if(len < 5 || strcasecmp(dirp->d_name + len - 4, ".mp3") != 0)
+		if(len < 5 || strcasecmp(dirp->d_name + len - 4, ".ogg") != 0)
 			continue;
 		wchar_t wname[256];
 		BufferIO::DecodeUTF8(dirp->d_name, wname);