xpp: new versioning for WP 3.8 - see readme

git-svn-id: https://plugins.svn.wordpress.org/xili-postinpost/trunk@860266 b8457f37-d9ea-0310-8a92-e5e31aec5664
xpp: new versioning for WP 3.8 readme fixed...

git-svn-id: https://plugins.svn.wordpress.org/xili-postinpost/trunk@860274 b8457f37-d9ea-0310-8a92-e5e31aec5664