[web] Stop using negative indices with os.stat results
The python doc says:
More items may be added at the end by some implementations.
.st_mtime is also more readable than [-2].
.. -*- coding: utf-8 -*-
.. _Part1:
--------------------------
Introduction to *CubicWeb*
--------------------------
This first part of the book offers different reading path to
discover the *CubicWeb* framework, provides a tutorial to get a quick
overview of its features and lists its key concepts.
.. toctree::
:maxdepth: 2
:numbered:
history
concepts.rst