Clean up CSS

- Add vim folds to make organized sections
- Rename a lot of classes from post- to page-
- Generalize series CSS classes better
- Clean up navbar div structure
- Remove langpicker and most of multilingual support
- many other minor tweaks

exampleSite/config.yaml

@@ -61,10 +61,3 @@ languages:
     languageName: English
     title: Example Website
     weight: 1
-
-  es:
-    languageName: Español
-    title: Sitio web ejemplo
-    weight: 2
-    params:
-      description: Sitio web ejemplo para bobatheme