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/Timer/src/Timer.cpp

@@ -0,0 +1,55 @@
+//
+// Timer.cpp
+//
+// This sample demonstrates the Timer and Stopwatch classes.
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#include "Poco/Timer.h"
+#include "Poco/Thread.h"
+#include "Poco/Stopwatch.h"
+#include <iostream>
+
+
+using Poco::Timer;
+using Poco::TimerCallback;
+using Poco::Thread;
+using Poco::Stopwatch;
+
+
+class TimerExample
+{
+public:
+	TimerExample()
+	{
+		_sw.start();
+	}
+	
+	void onTimer(Timer& timer)
+	{
+		std::cout << "Callback called after " << _sw.elapsed()/1000 << " milliseconds." << std::endl;
+	}
+	
+private:
+	Stopwatch _sw;
+};
+
+
+int main(int argc, char** argv)
+{	
+	TimerExample example;
+
+	Timer timer(250, 500);
+	timer.start(TimerCallback<TimerExample>(example, &TimerExample::onTimer));
+	
+	Thread::sleep(5000);
+	
+	timer.stop();
+	
+	return 0;
+}