Major plugin refactor and cleanup.

Switched to POCO library for unified platform/library interface.
Deprecated the external module API. It was creating more problems than solving.
Removed most built-in libraries in favor of system libraries for easier maintenance.
Cleaned and secured code with help from static analyzers.

vendor/POCO/Foundation/samples/BinaryReaderWriter/src/BinaryReaderWriter.cpp

@@ -0,0 +1,54 @@
+//
+// BinaryReaderWriter.cpp
+//
+// This sample demonstrates the BinaryWriter and BinaryReader classes.
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#include "Poco/BinaryWriter.h"
+#include "Poco/BinaryReader.h"
+#include <sstream>
+#include <iostream>
+
+
+using Poco::BinaryWriter;
+using Poco::BinaryReader;
+
+
+int main(int argc, char** argv)
+{
+	std::stringstream str;
+	
+	BinaryWriter writer(str);
+	writer << true
+	       << 'x'
+	       << 42
+	       << 3.14159265
+	       << "foo bar";
+	       
+	bool   b;
+	char   c;
+	int    i;
+	double d;
+	std::string s;
+	
+	BinaryReader reader(str);
+	reader >> b
+	       >> c
+	       >> i
+	       >> d
+	       >> s;
+	       
+	std::cout << b << std::endl
+	          << c << std::endl
+	          << i << std::endl
+	          << d << std::endl
+	          << s << std::endl;
+	          	
+	return 0;
+}