Function _shuffle

src/basil.set.js:25–28

(o)

		},
		//http://stackoverflow.com/questions/6274339/how-can-i-shuffle-an-array-in-javascript
		_shuffle = function (o){
			for (var j, x, i = o.length; i; j = Math.floor(Math.random() * i), x = o[--i], o[i] = o[j], o[j] = x);
			return o;
		},
		_union = function () {
			var args = arguments[0],
				allElements = [],