tagging v1.5

git-svn-id: https://plugins.svn.wordpress.org/polylang/trunk@922941 b8457f37-d9ea-0310-8a92-e5e31aec5664
release v1.5

git-svn-id: https://plugins.svn.wordpress.org/polylang/trunk@922944 b8457f37-d9ea-0310-8a92-e5e31aec5664