Add more descriptive classes to submit meta box sections. props nofearinc. fixes #22333.

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Pinking shears

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PHPDoc for WP_Post properties. fixes #25092.


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Twenty Fourteen: Use HTML5 comment markup, props obenland. Fixes #25045.
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Twenty Fourteen: Align post format handling with Twenty Thirteen. Props Frank Klein and obenland, see #24877.
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Twenty Fourteen: remove searchform.php and use core markup. Props obenland, closes #25095.
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Twenty Fourteen: widgetize the Post Format front page so other widgets can be used there, and the special Post Format content can be used in other widget areas. Props obenland, see #25028.
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