Add develop branch.

Author: paulross

README.md

@@ -5,3 +5,9 @@ Examples of reliable coding of Python 'C' extensions by Paul Ross.
 The full documentation is on [Read the Docs](http://pythonextensionpatterns.readthedocs.org/en/latest/index.html).
 
 Code examples and documentation source are right here on GitHub.
+
+
+## TODO
+
+* Reorganinse source code.
+* More here...

doc/presentations/ReadMe.md

@@ -0,0 +1,5 @@
+# Presentations about Python Extension Patterns
+
+PyCon UK 2015: [https://www.youtube.com/watch?v=ViRIYqiU128](https://www.youtube.com/watch?v=ViRIYqiU128)
+
+PyCon US 2016: [https://www.youtube.com/watch?v=Yq__HtUIH5Y](https://www.youtube.com/watch?v=Yq__HtUIH5Y)

doc/sphinx/source/index.rst

@@ -21,6 +21,7 @@ This describes reliable patterns of coding Python Extensions in C. It covers the
 	super_call
 	compiler_flags
 	debugging/debug
+	memory_leaks
 	thread_safety
 	code_layout
 	cpp

doc/sphinx/source/memory_leaks.rst

@@ -0,0 +1,21 @@
+.. highlight:: python
+    :linenothreshold: 10
+
+.. highlight:: c
+    :linenothreshold: 10
+
+.. toctree::
+    :maxdepth: 3
+
+
+.. _memory_leaks-label:
+
+===============================================
+Memory Leaks
+===============================================
+
+Memory leaks.
+
+.. note::
+
+    Some note.

requiriments.txt

@@ -0,0 +1,24 @@
+alabaster==0.7.12
+Babel==2.8.0
+certifi==2020.6.20
+chardet==3.0.4
+docutils==0.16
+idna==2.10
+imagesize==1.2.0
+Jinja2==2.11.2
+MarkupSafe==1.1.1
+packaging==20.4
+Pygments==2.7.1
+pyparsing==2.4.7
+pytz==2020.1
+requests==2.24.0
+six==1.15.0
+snowballstemmer==2.0.0
+Sphinx==3.2.1
+sphinxcontrib-applehelp==1.0.2
+sphinxcontrib-devhelp==1.0.2
+sphinxcontrib-htmlhelp==1.0.3
+sphinxcontrib-jsmath==1.0.1
+sphinxcontrib-qthelp==1.0.3
+sphinxcontrib-serializinghtml==1.1.4
+urllib3==1.25.11