List files in a directory asynchronously using async generators in ES7.

	/**
	* My first foray into the land of ES7.
	*
	* We had an interesting challenge in our office of using node to output the files
	* in a given directory and it's subdirectories and sort them.
	*
	* We had some very interesting solutions from using co-routines to
	* pub/subs from an a wide variety of engineers from C developers to front-enders.
	*
	* Here's my solution using some ES7 features.
	*
	* You can run this in traceur but you'll need the experimental flag
	* and a library to promisify node's fs lib. You'll need to polyfill Array.from
	* which I haven't tested yet.
	*/


	async function* ls(path) {
	let files = await fs.readdir(path);

	for (let file of files) {
	let subPath = `${path}/${file}`,
	stat = await fs.lstat(subPath);

	if (stat.isDirectory()) {
	yield* ls(subPath);
	} else {
	yield subPath;
	}
	}
	}

	(async function() {
	console.log(Array.from(ls(process.cwd())).sort().join("\n")); // untested, not supported yet, could polyfil
	})();