Optional CSV Header

Fixed issue from #8 and added tests.

#9 looks good to me. It'd be great if folks above could confirm as well.

This looks great, has tests! And manually testing it also shows it works.

Thanks @andrewbelcher and others that helped, especially @Andrey.Baranovskiy for adding tests. I don't need this feature (at the moment), but it is something I noticed lacking from the D7 version.

This was requested in 💬 CSV - how to remove header row? Closed: duplicate and as #11 says this looks like a great patch and improvement, we should get this in!

Changing to a MR based on the patch in #9

Setting to RTBC as before.

Thanks everyone for your work on this issue, I've merged the MR and given liberal amounts of issue credit, thanks!

Automatically closed - issue fixed for 2 weeks with no activity.