[Twisted-Python] Note for 2.0 package maintainers

[Eric Mangold]

If you're creating 2.0 packages there is one little thing you need to do
to make Zsh tab-completion work automatically.

The file twisted/python/_twisted_zsh_stub needs to be installed in the zsh
site-functions directory. Of course, where the site-functions directory is
located is system dependant. If you have zsh installed, you can see where
it is with this command:
    zsh -f -c 'echo ${(M)fpath:#/*/site-functions}'

-Eric