Issue #2429191 by claudiu.cristea, amateescu, yched, nlisgo, Berdir, alexpott, klausi, Wim Leers, xjm, catch: Deprecate entity_reference.module and move its functionality to core

Issue #2107243 by amateescu, jibran, larowlan, Xano: Decouple entity reference selection plugins from field definitions

Issue #2383197 by queenvictoria, bforchhammer, webflo, jhedstrom: Entities not loaded for relationships on same entity type

Revert "Issue #2383197 by queenvictoria, bforchhammer: Entities not loaded for relationships on same entity type"

This reverts commit a4bb2fa5.

Issue #2383197 by queenvictoria, bforchhammer: Entities not loaded for relationships on same entity type

Issue #2384481 by rpayanm, daffie, tadityar, hussainweb, areke, claudiu.cristea: Make the class variables protected for NodeType

Issue #2183983 by Gábor Hojtsy, vijaycs85, Berdir, Wim Leers, webflo, alexpott: Find hidden configuration schema issues

Issue #2312093 by alexpott, yched, andypost, swentel | xjm: Rename FieldInstanceConfig to FieldConfig.

Issue #2287727 by yched, swentel, alexpott: Rename Field[instance]Config classes and entity types (again).

Issue #697760 by sun: Replace getInfo() in tests with native phpDoc + annotations (following PHPUnit).

Issue #2277941 by yched: Allow injecting an arbitrary FieldConfig when building a FieldInstanceConfig.

Issue #2095303 by swentel, plopesc, Berdir, claudiu.cristea, yched: Rename 'field_entity' to 'field_config' and 'field_instance' to 'field_instance_config'.

Issue #1497374 by yched, chx, amateescu, plach, Damien Tournoud, fago, swentel: Switch from Field-based storage to Entity-based storage.

Issue #2017851 by pcambra, amateescu, Pancho: Move entity_reference_get_selection_handler() to a method on SelectionPluginManager.

Issue #1950632 by effulgentsia, Wim Leers, amateescu, yched: Create a FieldDefinitionInterface, decoupled from  and  config entities, and use it for formatters and widgets.

Issue #1801304 by Amitaibu, amateescu, effulgentsia, tim.plunkett, EclipseGc, Fabianx, Cottser: Added Entity reference field.