public String durationToString(long howLongInSecs)
	{
		String out = "";

		if (howLongInSecs >= 86400)
			out += "" + (howLongInSecs / 86400) + "d ";

		out += "" + make2Digit("" + ((howLongInSecs / 3600) % 24)) + ":" + make2Digit("" + ((howLongInSecs / 60) % 60)) + ":" + make2Digit("" + (howLongInSecs % 60));

		return out;
	}