License inconsistency

The `LICENSE` file in the repository contains Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported (by-nc-sa). The [website](http://docs.python-guide.org/en/latest/) says it is "Creative Commons Share-Alike 3.0" (by-sa) but links to [by-nc-sa](http://creativecommons.org/licenses/by-nc-sa/3.0/).
