Ready for testing: Unicode support for Handle I/O

[Paolo Losi]

Simon Marlow wrote:

> The only change to the existing behaviour is that by default, text IO
> is done in the prevailing encoding of the system.  Handles created by
> openBinaryFile use the Latin-1 encoding, as do Handles placed in
> binary mode using hSetBinaryMode.

wouldn't be semantically correct for a "binary handle"
to "return" [Word8]?

also switching from text to binary (hSetBinaryMode)
doesn't seem "natural"

I understand that this has "heavy" consequences...

Pao