Add a stub documentation page about embedding Cython modules in C/C++ applications.

docs/src/tutorial/embedding.rst

+.. highlight:: cython
+
+.. _embedding:
+
+**********************************************
+Embedding Cython modules in C/C++ applications
+**********************************************
+
+This is a stub documentation page. PRs welcome.
+
+* `CPython docs <https://docs.python.org/3/extending/embedding.html>`_
+
+* `Cython Wiki <https://github.com/cython/cython/wiki/EmbeddingCython>`_
+
+* See the ``--embed`` option to the ``cython`` and ``cythonize`` frontends
+  for generating a C main function.
+
+* `Embedding demo program <https://github.com/cython/cython/tree/master/Demos/embed>`_
+
+* The `PyImport_AppendInittab() <https://docs.python.org/3/c-api/import.html#c.PyImport_AppendInittab>`_
+  function in CPython allows registering statically (or dynamically) linked extension modules
+  for later imports.
+
+* Also see the documentation of the
+  `module init function <https://docs.python.org/3/extending/extending.html#the-module-s-method-table-and-initialization-function>`_
+  in CPython and `PEP 489 <https://www.python.org/dev/peps/pep-0489/>`_ regarding the module
+  initialisation mechanism in CPython 3.5 and later.

docs/src/tutorial/index.rst

@@ -13,10 +13,10 @@ Tutorials
    profiling_tutorial
    strings
    memory_allocation
+   embedding
    pure
    numpy
    array
    readings
    related_work
    appendix
-