Released ipython 6.0.0rc1

Hi all, I just made a release of IPython 6.0.0 Rc1 yesterday.
You can try with

    pip install ipython --upgrade --pre

This version is Python 3 Only, but if you have a recent enough pip,
you should automatically get the latest compatible with your system,
that is to say 5.x which is still actively developed.

See http://ipython.readthedocs.io/en/latest/whatsnew/version6.html for
the what's new.
-- 
Matthias