Issue #1807662 by sun, beejeebus, damiankloip, Wim Leers, Mixologic: Built-in APCu support in core (PHP 5.5 only).

Issue #2266501 by Gábor Hojtsy, vijaycs85, YesCT: Array level schema errors are not reported, fix wrong schemas identified.

Issue #2222719 by effulgentsia, tim.plunkett, xjm, dawehner: Use parameter matching via reflection for access checks instead of pulling variables from request attributes.

Issue #375062 by cs_shadow, juampy, theunraveler, mondrake, hswong3i, smk-ka: Imagecolorsforindex() Color index nnn out of range in GDToolkit.

Issue #2266377 by dawehner, bkosborne, pwolanin: Speed up UrlGenerator a little by setting the 'external' option in the Url object  .

Issue #2267763 by pwolanin, tim.plunkett: Page titles with %placeholders are broken when used as breadcrumbs.

Issue #2266859 by tim.plunkett: Move the dependency calculation helper methods from ConfigEntityBase to generic traits.

Issue #2268439 by Gábor Hojtsy: String introspection backwards data typing is confusing / incorrect.

Issue #2258299 by juampy: Dblog_menu_link_defaults_alter() must set 'machine_name' to avoid duplicates.

This reverts commit ecf2fa72.

This reverts commit c5c075df.

Issue #2229181 by pwolanin, Berdir, fago: MapItem::propertyDefinitions() claims it has a static value property, which is wrong.

Issue #2249113 by tstoeckler, jessebeach: Use an entity save instead of db_insert() in user_install().

Issue #2261369 by Berdir: Introduce a common config entity base class for all bundle config entity types.

Issue #2257835 by tim.plunkett, sun, Jalandhar: Move form submission logic out of FormBuilder into a new class.

Issue #2263351 by Wim Leers: Text Editor's in-place editing plugin broke in-place editing at large due to PHP fatal.

Issue #2198713 by tstoeckler: Add a settings.php variable to allow to discover/enable test extensions at regular runtime.

Issue #2254495 by sun, ParisLiakos, alexpott: Followup to Move language_admin_predefined_list to ConfigurableLanguageManager.

This reverts commit c024e97b.

Issue #2260321 by sun: Use Testing profile instead of Minimal profile in interactive installer tests by default.

Issue #2126761 by Tim Bozeman, SGhosh, Jalandhar: The body field summary textarea indicates it has a description with aria-describedby attribute, but the DOM id value points to a non-existent node.

Issue #2260035 by blueminds | jhodgdon: Hook_field_info_max_weight in field.api.php is not in a group/topic.

Issue #2079863 by filijonka, mrsinguyen, fabricebernhard, Chernous_dn, YesCT: Remove Unused local variable from /core/lib/Drupal/Component Utility/Crypt.php  Transliteration/PHPTransliteration.php  Utility/UserAgent.php  Gettext/PoHeader.php.

Issue #2088027 by tim.plunkett | YesCT: Just placed block keeps changed color even after saving the block layout page.