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/include/Poco/Stopwatch.h

@@ -0,0 +1,108 @@
+//
+// Stopwatch.h
+//
+// Library: Foundation
+// Package: DateTime
+// Module:  Stopwatch
+//
+// Definition of the Stopwatch class.
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Foundation_Stopwatch_INCLUDED
+#define Foundation_Stopwatch_INCLUDED
+
+
+#include "Poco/Foundation.h"
+#include "Poco/Clock.h"
+
+
+namespace Poco {
+
+
+class Foundation_API Stopwatch
+	/// A simple facility to measure time intervals
+	/// with microsecond resolution.
+{
+public:
+	Stopwatch();
+	~Stopwatch();
+
+	void start();
+		/// Starts (or restarts) the stopwatch.
+		
+	void stop();
+		/// Stops or pauses the stopwatch.
+	
+	void reset();
+		/// Resets the stopwatch.
+		
+	void restart();
+		/// Resets and starts the stopwatch.
+		
+	Clock::ClockDiff elapsed() const;
+		/// Returns the elapsed time in microseconds
+		/// since the stopwatch started.
+		
+	int elapsedSeconds() const;
+		/// Returns the number of seconds elapsed
+		/// since the stopwatch started.
+
+	static Clock::ClockVal resolution();
+		/// Returns the resolution of the stopwatch.
+
+private:
+	Stopwatch(const Stopwatch&);
+	Stopwatch& operator = (const Stopwatch&);
+
+	Clock            _start;
+	Clock::ClockDiff _elapsed;
+	bool             _running;
+};
+
+
+//
+// inlines
+//
+inline void Stopwatch::start()
+{
+	if (!_running)
+	{
+		_start.update();
+		_running = true;
+	}
+}
+
+
+inline void Stopwatch::stop()
+{
+	if (_running)
+	{
+		Clock current;
+		_elapsed += current - _start;
+		_running = false;
+	}
+}
+
+
+inline int Stopwatch::elapsedSeconds() const
+{
+	return int(elapsed()/resolution());
+}
+
+
+inline Clock::ClockVal Stopwatch::resolution()
+{
+	return Clock::resolution();
+}
+
+
+} // namespace Poco
+
+
+#endif // Foundation_Stopwatch_INCLUDED