[cubicweb/doc] Add tutorial on data import in CubicWeb.
This involves creating the "tutorials/dataimport" directory
structure under "cubicweb/doc" and, inside the "dataimport" directory,
putting several files:
- a ResT file containing the tutorial *per se*; this tutorial addresses
the following issues:
* creating a CubicWeb schema for representing a given data set (here,
the Diseasome RDF data, for illustration purposes);
* parsing the data;
* importing the data, by using several stores:
+ the ``RQLObjectStore``, ``NoHookRQLObjectStore`` and
``SQLGenObjectStore`` from the ``dataimport`` module in CubicWeb;
+ the ``MassiveObjectStore`` from the ``dataimport`` module
in the ``dataio`` cube.
The tutorial also provides timing benchmarks of the various stores.
- a set of Python files illustrating the data import, in the context
of Diseasome RDF data parsing:
* a Diseasome RDF data parse module,
* a Diseasome data import module,
* a CubicWeb schema for representing Diseasome data.
====Book====----Part----Chapter=======.. _Level1AnchorForLaterReference:Level 1 section---------------Level 2 section~~~~~~~~~~~~~~~Level 3 section```````````````*CubicWeb*inline directives: :file:`directory/file` :envvar:`AN_ENV_VARIABLE` :command:`command --option arguments` :ref:, :mod:.. sourcecode:: python class SomePythonCode: ..... XXX a comment, wont be rendereda [foot note]_.. [foot note] the foot note contentBoxes=====- warning box: .. warning:: Warning content- note box: .. note:: Note contentCross references================To arbitrary section--------------------:ref:`identifier` ou :ref:`label <identifier>`Label required of referencing node which as no title, else the node's title will be used.To API objects--------------See the autodoc sphinx extension documentation. Quick overview:* ref to a class: :class:`cubicweb.devtools.testlib.AutomaticWebTest`* if you can to see only the class name in the generated documentation, add a ~: :class:`~cubicweb.devtools.testlib.AutomaticWebTest`* you can also use :mod: (module), :exc: (exception), :func: (function), :meth: (method)...* syntax explained above to specify label explicitly may also be used