Twenty Thirteen: add styles for default core output for structured quote post format. Depends on #23347 for the improved markup for quote post formats. Props obenland, see #23852.

git-svn-id: http://core.svn.wordpress.org/trunk@23802 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: explicitly declare 'link' and 'video' as the only (current) structured post formats in Twenty Thirteen. See #23852 #23619 #23864 and #23620.

git-svn-id: http://core.svn.wordpress.org/trunk@23803 1a063a9b-81f0-0310-95a4-ce76da25c4cd