WP Super Edit first pass for upgrades; remove old development wp-se- plugins, update readme.txt, remove and remove registration of TinyMCE plugins for advhr, advlink, advimage, style, and xhtmlxtras

git-svn-id: https://plugins.svn.wordpress.org/wp-super-edit/trunk@927244 b8457f37-d9ea-0310-8a92-e5e31aec5664