subpackage version conflict with python2.7

[koyo922]

Following the instructions at "Installation" section of README,
various sub-packages of pyannote would be installed using latest version.
Some would conflict with python2.7

downgrade some packages can make pyannote-change-detection -h works

Note: I'm doing it at 2018/2/5, Beijing

pip install --force-reinstall pyannote.database==0.11.2
pip install --force-reinstall pyannote.generators==0.13

[yinruiqing]

In fact, this project has been merged into pyannote.audio. You can find more information here.

PS:
We move into python3 in the latest version.