Added sphinx_rtd_theme to extensions.

Author: anthony-tuininga

doc/src/conf.py

@@ -21,7 +21,7 @@
 
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
-extensions = ["table_with_summary", "oracle_deprecated"]
+extensions = ["table_with_summary", "oracle_deprecated", 'sphinx_rtd_theme']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['.templates']