add "fork me on GitHub" banner to doc pages

jbweston · jbweston · commit fcc1ab4a3e55 · 2019-09-30T14:19:22.000+02:00
Closes #79.
diff --git a/doc/source/conf.py b/doc/source/conf.py
@@ -30,6 +30,11 @@
 ]
 
 html_theme = 'alabaster'
+html_theme_options = {
+    "github_user": "jupyter",
+    "github_repo": "jupyter-sphinx",
+    "github_banner": True,
+}
 
 jupyter_sphinx_thebelab_config = {
     "binderOptions": {
