improved styling calendar

git-svn-id: https://plugins.svn.wordpress.org/the-holiday-calendar/trunk@1040241 b8457f37-d9ea-0310-8a92-e5e31aec5664
releasing 1.4.4

git-svn-id: https://plugins.svn.wordpress.org/the-holiday-calendar/trunk@1040243 b8457f37-d9ea-0310-8a92-e5e31aec5664