fix conf.py to use a different theme for local builds

Author: uvchik

doc/conf.py

@@ -107,12 +107,11 @@
 # -- Options for HTML output ----------------------------------------------
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-import sphinx_rtd_theme
-
-html_theme = "sphinx_rtd_theme"
-
-html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
-#html_theme = 'bizstyle'
+on_rtd = os.environ.get('READTHEDOCS') == 'True'
+if on_rtd:
+    html_theme = 'default'
+else:
+    html_theme = 'bizstyle'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the