New tail recursion decorator

[Michele Simionato]

Michele Simionato wrote:
> Using my decorator module 'tail_recursive' can even be turned in a
> signature-preserving
> decorator. I think I will add this great example to the documentation
> of the next version
> of decorator.py!
>
>  Michele Simionato

Done: see
http://www.phyast.pitt.edu/~micheles/python/decorator.zip and
http://www.phyast.pitt.edu/~micheles/python/documentation.html