Graphics/Backgrounds: Update backgrounds to new coding-style

Former-commit-id: 9f96b93706fd8417d6262392f0ce9ab9ca1985c3

include/Nazara/Graphics/ColorBackground.inl

@@ -0,0 +1,17 @@
+// Copyright (C) 2015 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Graphics module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <memory>
+#include <Nazara/Graphics/Debug.hpp>
+
+template<typename... Args>
+NzColorBackgroundRef NzColorBackground::New(Args&&... args)
+{
+	std::unique_ptr<NzColorBackground> object(new NzColorBackground(std::forward<Args>(args)...));
+	object->SetPersistent(false);
+
+	return object.release();
+}
+
+#include <Nazara/Graphics/DebugOff.hpp>