Use the WP.org CDN for About page images. fixes #26534.

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git-svn-id: http://core.svn.wordpress.org/trunk@26732 1a063a9b-81f0-0310-95a4-ce76da25c4cd
On update, delete files removed in 3.8.

props JPry.
fixes #26535.

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git-svn-id: http://core.svn.wordpress.org/trunk@26733 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Suppress admin notices on the about page.

Brings back [19393], accidentally reverted in [26718].

props ocean90.
fixes #26519.

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git-svn-id: http://core.svn.wordpress.org/trunk@26734 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Script handles of `false` are properly treated as meta groups. `true` does not work.

props SergeyBiryukov.
fixes #26525.

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git-svn-id: http://core.svn.wordpress.org/trunk@26735 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Bump Twenty Fourteen to 1.0.

props lancewillett.
fixes #26522.

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git-svn-id: http://core.svn.wordpress.org/trunk@26736 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix typos in Twenty Fourteen description.

props jeffr0.
fixes #26528.

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git-svn-id: http://core.svn.wordpress.org/trunk@26737 1a063a9b-81f0-0310-95a4-ce76da25c4cd