Enable Sphinx for RTDdocs

Also fix usage of zope.contenttype as a main module.

1 files changed, 4 insertions, 0 deletions

diff --git a/setup.py b/setup.py
index 1846a36..79f6f10 100644
--- a/setup.py
+++ b/setup.py
@@ -67,6 +67,10 @@ setup(
     tests_require=TESTS_REQUIRE,
     extras_require={
         'test': TESTS_REQUIRE,
+        'docs': [
+            'Sphinx',
+            'sphinx_rtd_theme',
+        ],
     },
     include_package_data=True,
     zip_safe=False,