//http://blog.codinghorror.com/the-danger-of-naivete/
//Knuth-Fisher-Yates shuffle
function shuffle(array:Array):Array
{
	var m:int = array.length;
	var t:*;
	var i:int;
	
	while (m){ // While there remain elements to shuffle…
		i = Math.floor(Math.random() * m--);     // Pick a remaining element…
		t = array[m]; // And swap it with the current element.
		array[m] = array[i];
		array[i] = t;
	}
	return array;
}