[doc] Restructure the documentation
* Create a new index file
* Move the sphinx configuration files do the documentation root
* Move book/README to dev/documenting.rst
* Move book/mode_plan.py to tools/
* Move book/en/images to images
* Move book/en/* to book/
* Move changelogs to changes/*
* Adapt the Makefile
* Add a title to the javascript api index
Related to #4832808
Base views
----------
|cubicweb| provides a lot of standard views, that can be found in
:mod:`cubicweb.web.views` sub-modules.
A certain number of views are used to build the web interface, which apply to one
or more entities. As other appobjects, their identifier is what distinguish them
from each others. The most generic ones, found in
:mod:`cubicweb.web.views.baseviews`, are described below.
You'll probably want to customize one or more of the described views which are
default, generic, implementations.
.. automodule:: cubicweb.web.views.baseviews
You will also find modules providing some specific services:
.. automodule:: cubicweb.web.views.navigation