Proposal #2: marshalling utilites

[Sven Panne]

Simon Marlow <simonmar at microsoft.com> wrote,
> [...] With that in mind, I'll propose the following changes:
> [...]

I agree with Manuel here:

   * Basically a "Make it so!"

   * Error handling should go into another module, but I'll
     stay off the naming battlefield this time.  :-)

   * errno *is* a thread local thing, of course.

   * s/Marshal/MarshalUtils/

Cheers,
   Sven