hide warning message for non registered users and users that do not have the right permissions.

git-svn-id: https://plugins.svn.wordpress.org/jm-twitter-cards/trunk@857184 b8457f37-d9ea-0310-8a92-e5e31aec5664
add deep linking, make documentation translation ready

git-svn-id: https://plugins.svn.wordpress.org/jm-twitter-cards/trunk@859009 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fix translation stuffs, add French version of Documentation

git-svn-id: https://plugins.svn.wordpress.org/jm-twitter-cards/trunk@860229 b8457f37-d9ea-0310-8a92-e5e31aec5664
wrong date changelog

git-svn-id: https://plugins.svn.wordpress.org/jm-twitter-cards/trunk@860238 b8457f37-d9ea-0310-8a92-e5e31aec5664