WP 3.6 tested and verified

git-svn-id: https://plugins.svn.wordpress.org/wp-spreadplugin/trunk@750006 b8457f37-d9ea-0310-8a92-e5e31aec5664
Translations modified

git-svn-id: https://plugins.svn.wordpress.org/wp-spreadplugin/trunk@750017 b8457f37-d9ea-0310-8a92-e5e31aec5664