Revert RakNet source files back to the original v2.518 state

* Add RakNet source files to the VS project

raknet/DS_HuffmanEncodingTreeNode.h

@@ -0,0 +1,30 @@
+/// \file
+/// \brief \b [Internal] A single node in the Huffman Encoding Tree.
+///
+/// This file is part of RakNet Copyright 2003 Kevin Jenkins.
+///
+/// Usage of RakNet is subject to the appropriate license agreement.
+/// Creative Commons Licensees are subject to the
+/// license found at
+/// http://creativecommons.org/licenses/by-nc/2.5/
+/// Single application licensees are subject to the license found at
+/// http://www.rakkarsoft.com/SingleApplicationLicense.html
+/// Custom license users are subject to the terms therein.
+/// GPL license users are subject to the GNU General Public
+/// License as published by the Free
+/// Software Foundation; either version 2 of the License, or (at your
+/// option) any later version.
+
+#ifndef __HUFFMAN_ENCODING_TREE_NODE
+#define __HUFFMAN_ENCODING_TREE_NODE
+
+struct HuffmanEncodingTreeNode
+{
+	unsigned char value;
+	unsigned weight;
+	HuffmanEncodingTreeNode *left;
+	HuffmanEncodingTreeNode *right;
+	HuffmanEncodingTreeNode *parent;
+};
+
+#endif