Twenty Thirteen: improve header area padding to ensure stable layout at any size screen. Props jvisick77, fixes #23732. (Small props also to Google TV for revealing the bug.)

git-svn-id: https://core.svn.wordpress.org/trunk@23678 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: pinking shears.

git-svn-id: https://core.svn.wordpress.org/trunk@23679 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: fix SVN properties.

git-svn-id: https://core.svn.wordpress.org/trunk@23680 1a063a9b-81f0-0310-95a4-ce76da25c4cd