Really fix site.baseurl usage

Author: eemeli

_config.yml

@@ -10,7 +10,7 @@ title:            messageformat.js
 tagline:          'ICU MessageFormat for Javascript'
 description:      'Gender- and plural-capable messages using ICU MessageFormat'
 url:              https://messageformat.github.io
-baseurl:          /
+baseurl:
 
 author:
   name:           'Alex Sexton & Eemeli Aro'