Twenty Eleven: fix showcase template display in IE7 and IE8, props obenland. Fixes #18024.

git-svn-id: http://core.svn.wordpress.org/trunk@23647 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: first pass at print styles, see #23552.

git-svn-id: http://core.svn.wordpress.org/trunk@23648 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add orientation information to gallery items. props obenland. fixes #23695.

git-svn-id: http://core.svn.wordpress.org/trunk@23649 1a063a9b-81f0-0310-95a4-ce76da25c4cd