update release/authors

- don't tell people to email Fernando every time IPython crashes :)
- supported Pythons updated to remove 3.1, add 3.3.
- `IPython.__author__` is now just ipython-dev, rather than assorted individuals
- don't mention old, unsupported Windowses (I would argue that XP should be dropped as well, but I know that won't fly)
Merge pull request #2815 from minrk/release_author

update release/authors