Disabled the sphinx extension as it causes the build to fail

Author: dantleech

conf.py

@@ -29,7 +29,9 @@
 
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
-extensions = ['phpcr.sphinx.cnd']
+
+# why doesn't this work on readthedocs?
+# extensions = ['phpcr.sphinx.cnd']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']