[Haskell] Encode module library

[Sven Panne]

Otakar Smrz wrote:
> [...] I would be happy for your comments and suggestions.

There were some extensive discussions about encoding/decoding on the libraries mailing
list some time ago, but IIRC no real consensus was reached. Among the problems were

    * The interface to the encoded/decoded data: A list might be enough for
      toy applications, but probably not for serious ones.

    * What to do in case of errors during encoding/decoding?

    * How should stateful encodings be handled?

    etc. etc.

Cheers,
    S.