Added Javascript textarea to posts and pages

git-svn-id: https://plugins.svn.wordpress.org/polymer-components/trunk@1017008 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added Javascript textarea to posts and pages

git-svn-id: https://plugins.svn.wordpress.org/polymer-components/trunk@1017013 b8457f37-d9ea-0310-8a92-e5e31aec5664