update compatibility

git-svn-id: https://plugins.svn.wordpress.org/delete-duplicate-data/trunk@856570 b8457f37-d9ea-0310-8a92-e5e31aec5664
change author name

git-svn-id: https://plugins.svn.wordpress.org/delete-duplicate-data/trunk@857670 b8457f37-d9ea-0310-8a92-e5e31aec5664