Message 72602 - Python tracker

I haven't managed to successfully complete the summer of code, due to
some personal problems, but I'm still working on 2to3 and on confidence
ranking for it.

There's a bzr branch with its current implementation at
http://isnomore.net/bzr/2to3 . I did an initial implementation of
confidence penalties on fix_dict for special contexts.

I'm still working on it (and on confidence ranking in general), but
please take a look and let me know what you think.