Move custom CSS and default highlight language away from include.rst

conf.py

@@ -55,4 +55,10 @@ html_theme = 'sphinx_rtd_theme'
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+html_static_path = ['_static']
+
+html_css_files = [
+	'css/86box.css',
+]
+
+highlight_language = 'c'