self-promotion of the decorator module

[Michele Simionato]

Notice that the decorator module is at version 0.4 and I still consider
it as experimental. The reason why I posted the link here is to get
feedback and it seems I got it ;)

I will upgrade to version 0.5 shortly, fixing the easily fixable bugs
and
documenting what cannot be easily fixed.

Thanks for testing border cases I would have never imagined!

           Michele Simionato