• Bump the minimum supported WordPress version to 4.3.
• Bump the minimum supported PHP version to 5.4.
• Remove archive_in_nav_menus as an option. The 'All' menu item should always be shown when has_archive is true.
• Implement featured image post type labels.
• Allow the %postname% token in custom permastructs.
• Conditionally set the default value of has_archive depending on the value of public.
• Correct the sort order for site queries with a default sort specified.
• Code tweaks courtesy of Scrutinizer and WPCS.
• Escaping!
• Clean up some docblocks.