Release new version 1.2

git-svn-id: https://plugins.svn.wordpress.org/wp-youtube-gallery/trunk@1025709 b8457f37-d9ea-0310-8a92-e5e31aec5664
update files

git-svn-id: https://plugins.svn.wordpress.org/wp-youtube-gallery/trunk@1025711 b8457f37-d9ea-0310-8a92-e5e31aec5664