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/XML/samples/DOMParser/src/DOMParser.cpp

@@ -0,0 +1,59 @@
+//
+// DOMParser.cpp
+//
+// This sample demonstrates the DOMParser, AutoPtr and
+// NodeIterator classes.
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#include "Poco/DOM/DOMParser.h"
+#include "Poco/DOM/Document.h"
+#include "Poco/DOM/NodeIterator.h"
+#include "Poco/DOM/NodeFilter.h"
+#include "Poco/DOM/AutoPtr.h"
+#include "Poco/SAX/InputSource.h"
+#include "Poco/Exception.h"
+#include <iostream>
+
+
+using Poco::XML::DOMParser;
+using Poco::XML::InputSource;
+using Poco::XML::Document;
+using Poco::XML::NodeIterator;
+using Poco::XML::NodeFilter;
+using Poco::XML::Node;
+using Poco::XML::AutoPtr;
+using Poco::Exception;
+
+
+int main(int argc, char** argv)
+{
+	// Parse an XML document from standard input
+	// and use a NodeIterator to print out all nodes.
+	
+	InputSource src(std::cin);
+	try
+	{
+		DOMParser parser;
+		AutoPtr<Document> pDoc = parser.parse(&src);
+		
+		NodeIterator it(pDoc, NodeFilter::SHOW_ALL);
+		Node* pNode = it.nextNode();
+		while (pNode)
+		{
+			std::cout << pNode->nodeName() << ":" << pNode->nodeValue() << std::endl;
+			pNode = it.nextNode();
+		}
+	}
+	catch (Exception& exc)
+	{
+		std::cerr << exc.displayText() << std::endl;
+	}
+	
+	return 0;
+}