Added requirements file for napoleon

doc/requirements.txt

+# Packages we need in order to build the docs, separated out so that rtfd.org
+# can install them.
+
+sphinx
+sphinxcontrib-napoleon

doc/source/conf.py

@@ -32,7 +32,7 @@ os.environ.setdefault("DJANGO_SETTINGS_MODULE", "settings.base")
 
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
-extensions = ['sphinx.ext.autodoc', 'sphinx.ext.coverage', 'sphinx.ext.ifconfig', 'sphinx.ext.todo']
+extensions = ['sphinx.ext.autodoc', 'sphinxcontrib.napoleon', 'sphinx.ext.coverage', 'sphinx.ext.ifconfig', 'sphinx.ext.todo']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']