Args replacement for Argu

[haf]

Hmm, needs review? Did you just build a parser ;)

[AnthonyLloyd]

Still v rough and I haven't tested it yet.

[haf]

There's a MIT-licensed single-fs-file parser that I financed/own over here https://github.com/logibit/EmParsec/blob/master/EmParsec.fs — that you can paste into this code-base if you want. It's been through a couple of thousands of strings, so it should do the trick; it doesn't reify values to arguments though, like you're doing.

[AnthonyLloyd]

@haf now fully functional as far as I can see.

[haf]

Looking good