Eventlet is going to drop Python 2.5 support in favour of Python 3.3+

[Sergey Shepelev]

If you use Eventlet on Python 2.5 - bad news.
Sample script to check:

# relies on virtualenv activated or eventlet installed globally
if python --version 2>&1 |fgrep -q 'Python 2.5' ; then
  if pip freeze |fgrep -q eventlet ; then
    echo 'bad news, read on'
  else
    echo ok
  fi
else
  echo ok
fi

As discussed here https://github.com/eventlet/eventlet/issues/6
we're going to drop Python 2.5 support in some near future.

Previous releases are still available for download in PyPi.

I encourage everybody to repost this message to your friends and colleagues.

If this change touches anybody, please, respond:
- by email eventletdev at lists.secondlife.com
- in Google+ https://plus.google.com/109869205442495270563/posts/GveGYMzubsp
- in Github issue https://github.com/eventlet/eventlet/issues/6