move Cython tutorial from user guide to tutorial part

--HG--
rename : docs/src/userguide/tutorial.rst => docs/src/tutorial/cython_tutorial.rst
extra : transplant_source : %97%AD%B6%9D%2A%0F%11a-%9F%F2%C6%BBOe%95%CD%CAX9

docs/src/userguide/tutorial.rst → docs/src/tutorial/cython_tutorial.rst

@@ -164,5 +164,6 @@ Language Details
 ================
 
 For more about the Cython language, see :ref:`language-basics`.
-To dive right in to using Cython in a numerical computation context, see :ref:`numpy_tutorial`.
+To dive right in to using Cython in a numerical computation context,
+see :ref:`numpy_tutorial`.
 

docs/src/tutorial/index.rst

@@ -4,6 +4,7 @@ Tutorials
 .. toctree::
    :maxdepth: 2
 
+   cython_tutorial
    external
    clibraries
    cdef_classes

docs/src/userguide/index.rst

@@ -6,7 +6,6 @@ Contents:
 .. toctree::
    :maxdepth: 2
 
-   tutorial
    language_basics
    extension_types
    special_methods