Add 'classes: wide' to configuration settings

Author: bpatzak

_config.yml

@@ -82,6 +82,7 @@ defaults:
       comments: true
       share: true
       related: true
+      classes: wide
   # _pages
   - scope:
       path: "_pages"
@@ -90,6 +91,7 @@ defaults:
       layout: single
       author_profile: false
       nav: "sidebar_nav"
+      classes: wide
 
 category_archive:
   type: liquid