Core: Bring back MemoryStream class (It's not perfect but necessary until a better replacement comes out)

Former-commit-id: e3106b98c9825e313525298a8d46ff9c40bf5027

include/Nazara/Core/MemoryStream.inl

@@ -0,0 +1,15 @@
+// Copyright (C) 2015 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Core/Debug.hpp>
+
+namespace Nz
+{
+	inline bool HashAppend(AbstractHash* hash, const MemoryStream& stream)
+	{
+		return HashAppend(hash, stream.GetBuffer());
+	}
+}
+
+#include <Nazara/Core/DebugOff.hpp>