make sure autodoc includes the docstring from __init__

docs/conf.py

@@ -31,6 +31,8 @@ import riakcached
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
 extensions = ['sphinx.ext.autodoc', 'sphinx.ext.coverage', 'sphinxcontrib.fulltoc', 'sphinx.ext.viewcode']
 
+autoclass_content = 'both'
+
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']