User Config 를 파일에서 읽고 쓰도록 수정.

TestApp1/TestApp1.cpp

 class TestApp1 : public DKApplication
 {
 	DKResourcePool resourcePool;
+	DKString userConfigPath;
+
 public:
 	void OnInitialize(void) override
 	{
 		DKLog("resPath: %ls", (const wchar_t*)resPath);
 		resourcePool.AddLocatorForPath(resPath);
 
-		DKVariant vulkanProps;
-		vulkanProps.NewValueAtKeyPath("pipelineCacheFilePath", 
-									  DefaultPath(SystemPath::AppExecutable).FilePathStringByAppendingPath("pipeline.cache"));
-
-		DKPropertySet::SystemConfig().SetValue("Vulkan", vulkanProps);
-
+		userConfigPath = DefaultPath(SystemPath::AppExecutable).FilePathStringByAppendingPath("app.config.xml");
+		int numItemsImported = DKPropertySet::DefaultSet().Import(userConfigPath, true);
+		if (numItemsImported >= 0)
+			DKLogI("UserSettings: %ls (%d items imported)", (const wchar_t*)userConfigPath, numItemsImported);
 
 		DKObject<DKData> vertData = resourcePool.LoadResourceData("shaders/texture/texture.vert.spv");
 		DKObject<DKData> fragData = resourcePool.LoadResourceData("shaders/texture/texture.frag.spv");
 	{
 		DKLogD("%s", DKGL_FUNCTION_NAME);
 
+		int numItemsExported = DKPropertySet::DefaultSet().Export(userConfigPath, true);
+		DKLogI("Setting saved: %ls (%d items exported)", (const wchar_t*)userConfigPath, numItemsExported);
+
 		DKLogI("Memory Pool Statistics");
 		size_t numBuckets = DKMemoryPoolNumberOfBuckets();
 		DKMemoryPoolBucketStatus* buckets = new DKMemoryPoolBucketStatus[numBuckets];