Fixed page and post IDs

git-svn-id: https://plugins.svn.wordpress.org/cleansave/branches/1.4.2@969282 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated README

git-svn-id: https://plugins.svn.wordpress.org/cleansave/branches/1.4.2@969283 b8457f37-d9ea-0310-8a92-e5e31aec5664