Issue #1904214 by vijaycs85: Fixed Installer auto-selects languages that don't have a translation, causing a requirements error.

Issue #1891516 by sun, Berdir, chx: Remove $install parameter from DrupalUnitTestBase::enableModules(), encourage to create individual schema tables only.

Issue #1914366 by vijaycs85, Gábor Hojtsy, alexpott: Move all configuration schema files into a schema subdirectory.

Issue #1910318 by katbailey: Make path resolution the responsibility of a series of PathProcessor classes, rather than one PathSubscriber class.

Issue #1906506 by Fabianx, steveoliver, Cottser: Added Twig settings implementation: Show theme hook / template suggestions in HTML comments.

Issue #494518 by c4doug, edrupal, Rob C, a_thakur, YesCT, mcrittenden: Added Allow for custom user registration approval email address.

Issue #1807692 by plach, YesCT, yched: Added Introduce a column synchronization capability and use it to translate alt and titles through the image field widget.

Issue #1515312 by heyrocker, beejeebus, alexpott, xjm, realityloop, sun: Added snapshots of last loaded config for tracking whether config has changed.

Issue #1809352 by nick_schuch, larowlan, jthorson, Wim Leers, Devin Carlson, effulgentsia, tim.plunkett, jessebeach | cweagans: Added Write tour.module and add it to core.

Issue #967566 by Letharion, mariusz.slonina, indytechcook, adnasa, joestewart, oriol_e9g, Fabianx, tim.plunkett, valthebald, tsvenson, rbayliss, sun, xjm | DocuAnt: Several important Core User settings need to implement hook_field_extra_fields().

Issue #1502816 by joates: Add help text explaining the limitations of language negotiation and page caching.

Issue #1913084 by tim.plunkett: Introduce a Form interface for building, validating, and submitting forms.

Issue #1785038 by beltofte: Standardize capitalization on actions in user admin: 'edit permissions', 'edit role', 'edit', 'translate', 'view', 'cancel'.

Issue #1864066 by sun, andypost, tim.plunkett: Simplify hook_menu_local_tasks() and MENU_DEFAULT_LOCAL_TASK usage.

Revert "Issue #1770772 by damiankloip, dawehner, tim.plunkett: Move row_plugin() from style_plugin() to the main view object."

This reverts commit 386bfa9f.

Issue #1831774 by damiankloip, tim.plunkett, Gábor Hojtsy, alexpott: Fixed Config import assumes that 'config_prefix' contains one dot only.

Issue #1901290 by dawehner: Replace the mini pager with a lite pager (which does not run a count query).

Issue #1882240 by dawehner, tim.plunkett: Remove default assignment of render_controller_class() in EntityManager.

Issue #1770772 by damiankloip, dawehner, tim.plunkett: Move row_plugin() from style_plugin() to the main view object.