WP 3.9 / TinyMCE 4.0 compatibility release
Added full support of content insertion button with WordPress 3.9+ (with TinyMCE 4.0)

git-svn-id: https://plugins.svn.wordpress.org/wp-frontpage-news/trunk@901801 b8457f37-d9ea-0310-8a92-e5e31aec5664