Twenty Thirteen: PHPDoc improvements for back-compat file, props DrewAPicture. Fixes #24363.

git-svn-id: https://core.svn.wordpress.org/trunk@24307 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: first pass to add post format visual styles to visual editor. Props celloexpressions and obenland, see #24308 and #24298.

git-svn-id: https://core.svn.wordpress.org/trunk@24308 1a063a9b-81f0-0310-95a4-ce76da25c4cd