release 1.5.6

git-svn-id: https://plugins.svn.wordpress.org/events-made-easy/trunk@1003449 b8457f37-d9ea-0310-8a92-e5e31aec5664
pot update

git-svn-id: https://plugins.svn.wordpress.org/events-made-easy/trunk@1003452 b8457f37-d9ea-0310-8a92-e5e31aec5664