cpp: move source files into src/ directory

cpp/src/msgpack.hpp

@@ -0,0 +1,24 @@
+//
+// MessagePack for C++
+//
+// Copyright (C) 2008-2009 FURUHASHI Sadayuki
+//
+//    Licensed under the Apache License, Version 2.0 (the "License");
+//    you may not use this file except in compliance with the License.
+//    You may obtain a copy of the License at
+//
+//        http://www.apache.org/licenses/LICENSE-2.0
+//
+//    Unless required by applicable law or agreed to in writing, software
+//    distributed under the License is distributed on an "AS IS" BASIS,
+//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//    See the License for the specific language governing permissions and
+//    limitations under the License.
+//
+#include "msgpack/object.hpp"
+#include "msgpack/zone.hpp"
+#include "msgpack/pack.hpp"
+#include "msgpack/unpack.hpp"
+#include "msgpack/sbuffer.hpp"
+#include "msgpack/vrefbuffer.hpp"
+#include "msgpack.h"