updated readme Bulk Category

git-svn-id: https://plugins.svn.wordpress.org/bulk-category/trunk@776547 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated readme Bulk Category

git-svn-id: https://plugins.svn.wordpress.org/bulk-category/trunk@776548 b8457f37-d9ea-0310-8a92-e5e31aec5664