Add theming test suite, fix a few bugs and doc problems.

tests/root/conf.py

@@ -26,6 +26,10 @@ pygments_style = 'sphinx'
 
 rst_epilog = '.. |subst| replace:: global substitution'
 
+html_theme = 'testtheme'
+html_theme_path = ['.']
+html_theme_options = {'testopt': 'testoverride'}
+
 html_style = 'default.css'
 html_static_path = ['_static']
 html_last_updated_fmt = '%b %d, %Y'