New version of "scipy lecture notes"

Dear Pythonistas,

We have just released a new version of the "scipy lecture notes":

These are a consistent set of materials to learn the core aspects of the
scientific Python ecosystem, from beginner to expert. They are written
and maintained by a set of volunteers and published under a CC-BY

Highlights of the latest version includes:

* a chapter giving a introduction to statistics in Python
* a new layout with emphasis on readability including on small devices
* fully doctesting for Python 2 and 3 compatibility

We hope that you will find these notes useful, for you, your colleagues,
or your students.