* Related content (articles) on compose screen for all users with English WordPress interface
* Language detection for WordPressP interface: non-English users don't get the widget, existing ones get opt-out

git-svn-id: https://plugins.svn.wordpress.org/wordpress-23-related-posts-plugin/trunk@802998 b8457f37-d9ea-0310-8a92-e5e31aec5664