Fix baseurl problems

Baseurl for stylesheets is picked from the Liquid tag site.github.url.
Why? Not sure, someone in the upstream repo made this change at some point.
Solution: For now, just add the value correctly through _config.yaml

_config.yml

@@ -1,5 +1,11 @@
 # Site wide configuration
 
+github:
+  url: /~kabhijit
+
+#baseurl:
+#url:
+
 title: kabhijit
 locale: en_US
 logo: logo.png # filename of a logo image that has been placed into your images directory