jQuery Migrate 1.1.1. props ocean90. see #22975.
Imporove a selector targeting taxonomy meta boxes. props SergeyBiryukoc. see #22975.
Stop using deprecated jQuery API (.browser and .live). Do manual UA sniffing where still necessary. Improve selector performance by using delegated events. props ocean90. see #22975.
Allow nonce name to be passed to wp_nonce_url(), as allowed by wp_nonce_field(). props MatthewRuddy, fixes #22423.
Twenty Thirteen: apply `box-sizing: border-box` as a universal selector. Props Jayjdk, see #23582.
Add self_link filter to self_link(). props josephscott. fixes #10434.
Update to PHPMailer 5.2.4. props bpetty. fixes #21074.
Twenty Thirteen: usability improvement for better viewing of images on attachment pages. Props DrewAPicture and obenland, fixes #23543.
Remove bogus pagination rules from the comments permastruct. (As in, comments/page/?([0-9]{1,})/?$.) props wonderboymusic, fixes #21138.
Twenty Thirteen: usability improvement for calendar widget links. Props MikeHansenMe, fixes #23606.
Twenty Thirteen: avoid padding bug with Masonry, props obenland, fixes #23646.
Automatically esc_url() the URL echoed by the_permalink().

This makes the_permalink() useful, rather than needing to do `echo esc_url( get_permalink() )` to get proper encoding of ampersands, etc. This will not double-encode when esc_url() has already been applied to the filter here, but that code can now be removed.

props mfields.
fixes #17562.
esc_url() when printing a URL into an attribute, even when it is known to be safe. (see #17562)
Make Twenty Thirteen the default theme.

Has the added benefit of ensuring the WordPress Beta Tester plugin allows updates of Twenty Thirteen.

props JustinSainton.
fixes #23573.
Compress scripts/styles: 3.6-alpha-23530.
Revert [23359]. The post_author and comment_count post object fields will remain numeric strings for back compat. see #22324.
Twenty Thirteen: wrap up vendor prefix cleanup with final Opera removals. Fixes #23582, props Jayjdk.
Twenty Thirteen: disable fixed navbar on small screens. Props obenland, fixes #23647.

Also closes #23526, #23535, and #23566
Ignore protected meta keys in meta_form(). see #18786.