Refactor app creation for better iOS support

openVulkanoCpp/ExampleApps/CubesExampleApp.cpp

@@ -95,7 +95,12 @@ public:
 	void Close() override{}
 };
 
-std::unique_ptr<openVulkanoCpp::IGraphicsApp> CubesExampleApp::Create()
+openVulkanoCpp::IGraphicsApp* CubesExampleApp::Create()
+{
+	return new CubesExampleAppImpl();
+}
+
+std::unique_ptr<openVulkanoCpp::IGraphicsApp> CubesExampleApp::CreateUnique()
 {
 	return std::make_unique<CubesExampleAppImpl>();
 }