Add recursive: true to readdir functions

[mhkeller]

If you wanted to recursively read all csvs in a directory, for example. This should be fairly easy to do since it just means having readdir call itself if the option exists.

[mhkeller]

A way to do this without adding another fs.stats and fs.statsSync call is to add a '/' to dirs when they're initially read. This is a minor, but breaking change.

[mhkeller]

i'm thinking by default it should return a flat array and then have an option to have it mirror your directory structure. which behavior were you expecting @1wheel?

[1wheel]

Flat array sounds right, this is what I'd use it for 90% of the time:

glob.sync(raceDir + "/**/*.json")
	.map(io.readFileSync)
	.forEach(d => {
		...
	})

[aubergene]

I've never used it either