QuantumPackage/docs/ref

* To reference the QP program prog, use :ref:`.prog.`

* See docs/source/_static/links.rst file for many useful macros
* option provider :option:`name_of_module provider`
* subroutine      :c:func:`my_subroutine` 
* module          :ref:`module`
* provider        :c:data:`my_provider` 
* qp_command      :ref:`qp_command`
* linux command   :command:`qp_command`
* linux command with option :command:`qp_command -o`
* environment variable :envvar:`VARIABLE`
* file :file:`filename`
* for a file to be referenced, type 
.. _myref:
in the head of the file.
(see https://www.sphinx-doc.org/en/1.7/markup/inline.html)
Then, to reference for "myref" just type :ref:`myref`
* roles like warning, note, etc : see http://www.sphinx-doc.org/en/1.6/markup/para.html
* URL : `<https://gitlab.com/eginer/qp_plugins_eginer>`_
  or use `IRPF90`_ and define
  _IRPF90: http://irpf90.ups-tlse.fr
  somewhere
* References of published results with QP should be added into docs/source/references.bib in bibtex
  format