scikit-image/scikit-image — pull request #1081 by SiggyF (2014-07-24 11:17:37+00:00)
Title: Move six into install_requires

In relation to the topic: https://github.com/scikit-image/scikit-image/issues/1041
Moved the six dependency to install_requires.
The other dependencies are left where they are, following this discussion:
http://mail.scipy.org/pipermail/numpy-discussion/2012-September/063969.html

Tested in empty virtualenv with py2.7.