doc(tutorials): add introduction and structure of the museum tutorial.

related: #76

doc/tutorials/museum/data-management.rst

+.. -*- coding: utf-8 -*-
+
+.. _TutosMuseumsDataManagement:
+
+Data management with CubicWeb
+=============================
+
+Import data
+~~~~~~~~~~~
+
+With our application customized, let's see how to import more data.
+There is several ways to import data in CubicWeb. In our tutorial, we want to import our
+museums from a `csv` file.
+
+Query data with RQL
+~~~~~~~~~~~~~~~~~~~
+
+RDF serialisation
+~~~~~~~~~~~~~~~~~
+
+Content negotiation
+~~~~~~~~~~~~~~~~~~~

doc/tutorials/museum/enhance-views.rst

+.. -*- coding: utf-8 -*-
+
+.. _TutosMuseumsEnhanceViews:

doc/tutorials/museum/getting-started.rst

+.. -*- coding: utf-8 -*-
+
+.. _TutosMuseumsGettingStarted:

doc/tutorials/museum/index.rst

+.. -*- coding: utf-8 -*-
+
+.. _TutosMuseums:
+
+Create a Website from scratch with CubicWeb
+===========================================
+
+Introduction
+~~~~~~~~~~~~
+
+This tutorial aims to demonstrate how to create a website using CubicWeb. This website will
+present museums from French Ministry of Culture data, available here_.
+
+.. _here: https://data.culture.gouv.fr/explore/dataset/liste-et-localisation-des-musees-de-france/export/
+
+First, we will start with installation and creation of our website, and a short presentation of
+out of the box CubicWeb functionnalities. Then, we will see how to enhance our views using Jinja2
+templates or React components to have a better looking site. Finally, we will see how to manage
+more data, and how to serialize them in RDF.
+
+At the end of this tutorial, we should have a website which give information about all France's
+museums, describes them in RDF and present them on a map.
+
+.. toctree::
+   :maxdepth: 2
+
+   getting-started
+   enhance-views
+   data-management
+