Add warning for TinyMCE 4.0 settings update.

git-svn-id: https://plugins.svn.wordpress.org/advanced-tinymce-configuration/trunk@895289 b8457f37-d9ea-0310-8a92-e5e31aec5664
Bump version number.

git-svn-id: https://plugins.svn.wordpress.org/advanced-tinymce-configuration/trunk@895354 b8457f37-d9ea-0310-8a92-e5e31aec5664