updating and fixing mce-table plugin

git-svn-id: https://plugins.svn.wordpress.org/pressbooks-textbook/trunk@885992 b8457f37-d9ea-0310-8a92-e5e31aec5664
deleting unnecessary files

git-svn-id: https://plugins.svn.wordpress.org/pressbooks-textbook/trunk@885995 b8457f37-d9ea-0310-8a92-e5e31aec5664
updating version

git-svn-id: https://plugins.svn.wordpress.org/pressbooks-textbook/trunk@886000 b8457f37-d9ea-0310-8a92-e5e31aec5664