Add screenshot-03 to show print styles

git-svn-id: https://plugins.svn.wordpress.org/tabby-responsive-tabs/trunk@990633 b8457f37-d9ea-0310-8a92-e5e31aec5664
1.2.0 Stable

git-svn-id: https://plugins.svn.wordpress.org/tabby-responsive-tabs/trunk@990638 b8457f37-d9ea-0310-8a92-e5e31aec5664