Fixed bug where some child pages weren't displaying on parent

git-svn-id: https://plugins.svn.wordpress.org/subpages-expand/trunk@663316 b8457f37-d9ea-0310-8a92-e5e31aec5664
Merge branch 'master' of github.com:BryanH/Wordpress_subpage-expand
Bumped version in main file to correct plugin version