Adding basics of Writing Extensions chapter.

docs/extending/coding_style.rst

@@ -0,0 +1,5 @@
+===============================
+Coding Style and Best Practices
+===============================
+
+Lorem ipsum dolor met

docs/extending/index.rst

@@ -0,0 +1,14 @@
+==================
+Writing Extensions
+==================
+
+Lorem ipsum dolor met
+
+
+Index of Contents
+-----------------
+
+.. toctree::
+   :maxdepth: 2
+
+   coding_style

docs/index.rst

@@ -40,4 +40,4 @@ Developers
 .. toctree::
    :maxdepth: 1
 
-   dev
+   extending/index