Released v2.0.58

git-svn-id: https://plugins.svn.wordpress.org/nextgen-gallery/trunk@872729 b8457f37-d9ea-0310-8a92-e5e31aec5664
Changed the stable tag to 2.0.58

git-svn-id: https://plugins.svn.wordpress.org/nextgen-gallery/trunk@872730 b8457f37-d9ea-0310-8a92-e5e31aec5664