Add notification for fresh install

git-svn-id: https://plugins.svn.wordpress.org/arabic-font/trunk@1035329 b8457f37-d9ea-0310-8a92-e5e31aec5664
error in line 33

git-svn-id: https://plugins.svn.wordpress.org/arabic-font/trunk@1035330 b8457f37-d9ea-0310-8a92-e5e31aec5664