Twenty Fourteen: pinking shears.

git-svn-id: https://develop.svn.wordpress.org/trunk@26597 602fd350-edb4-49c9-b593-d223f7449a82
Twenty Fourteen: ensure attachment image size is correct at 810 pixels. Props iamtakashi, fixes #26384.

git-svn-id: https://develop.svn.wordpress.org/trunk@26598 602fd350-edb4-49c9-b593-d223f7449a82
Twenty Fourteen: remove `wp_is_mobile()` call from post thumbnail size logic as it's not intended for front-end use. Props kwight, fixes #26221.

git-svn-id: https://develop.svn.wordpress.org/trunk@26599 602fd350-edb4-49c9-b593-d223f7449a82