Message2463

I originally submitted this as a bug report, but I
guess it will be easier to find here.

I found that the current CVS version of Jython misses
the itertools package (which CPython implements in C),
so I grabbed the descriptive implementation from the
CPython 2.4.2 documentation and put it into a module.
It does not completely work, but it rather seems to
trigger bugs in Jython than in the module (I filed a
bug report on that, too). The module misses the
implementation of 'tee()', which isn't complete in the
docs (but which was only added in 2.4, so there
shouldn'd be much code that relies on it). Anyway, an
incomplete module is better than none.