[docs] Showing the Python 3 migration of most requested packages

[cclauss]

Hi Folks,

    On the page http://www.python.org/3kpoll there is a list of requests to migrate packages to Python 3.  Next to each package in that list, it would be quite useful to add the status of Python 3 support.  This page currently leaves the uniformed reader with the impression that all these requests remain unfulfilled.

    Thanks.