README doesn't explain the status of the project

[vn971]

Hi! Currently, hs-toxcore has an almost empty README, making it hard to understand the status of hs-toxcore.

Could you please write "Work-in-Progress Haskell Tox implementation." or "Haskell Tox implementation (Alpha)" or something like that? If it's fully ready, then a small indication of that would also help readers a lot (I think)

Thanks for considering! Personally, I don't know myself, otherwise I'd write a PR.