add language file

git-svn-id: https://plugins.svn.wordpress.org/google-analytics-dashboard-extends/trunk@1047229 b8457f37-d9ea-0310-8a92-e5e31aec5664
add language file

git-svn-id: https://plugins.svn.wordpress.org/google-analytics-dashboard-extends/trunk@1047238 b8457f37-d9ea-0310-8a92-e5e31aec5664