Version number fixed

git-svn-id: https://plugins.svn.wordpress.org/subpages-expand/trunk@663322 b8457f37-d9ea-0310-8a92-e5e31aec5664
Merge branch 'master' of github.com:BryanH/Wordpress_subpage-expand
Add button to editor for shortcode
Reorganize js location; enqueue properly
Button correctly added to page editor and using l10n