Where should a UTF-8 module be put? Text.UTF8?

See http://www.haskell.org/~simonmar/lib-hierarchy.html (I really ought to put this in the repository somewhere). Text encodings are in Text.Encoding at the moment. I think we should start with lazy steam encoders/decoders, and later add monadic versions and ones that work with arrays. For GHC, we'll want some really low-level ones that work on ByteArray# for use in the I/O libraries, but that can come later (maybe use libiconv?). Cheers, SImon