wordpress 3.5 media manager integration start

git-svn-id: http://plugins.svn.wordpress.org/galleriapress/trunk@667983 b8457f37-d9ea-0310-8a92-e5e31aec5664
integrated with new wordpress media manager

git-svn-id: http://plugins.svn.wordpress.org/galleriapress/trunk@704955 b8457f37-d9ea-0310-8a92-e5e31aec5664