Issue #2016177 followup by amateescu, agentrickard: Regression: Refactor 'autocreate entity' handling from entity_reference().

Issue #2013939 by swentel, amateescu, pcambra: Remove hook_field_CRUD_() in favor of hook_entity_TYPE_CRUD() calls.

Issue #1969728 by yched, effulgentsia, swentel, fago, plach: Implement Field API 'field types' as TypedData Plugins.

Issue #1981306 by aspilicious, andypost, pcambra, swentel, amateescu: Drop procedural usage of fields in [a-e] modules.

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

Issue #2003630 by ebeyrent, alexander.ilivanov: Replace drupal_container() with Drupal::service() in the entity_reference() module.

Issue #1751234 by yched, amateescu, swentel, kotnik, webflo, pcambra | tstoeckler: Convert option widgets to Plugin system.

Issue #1953832 by xjm, David_Rothstein: Replace 'target type' on entity reference field settings with something clearer.

Issue #1801356 by dawehner, disasm, amateescu, effulgentsia: Entity reference autocomplete using routes.

Issue #1818556 by das-peter, plach, fago, Berdir, vijaycs85: Change notice: Convert nodes to the new Entity Field API.

Issue #1924774 by amateescu, larowlan: Add a helper function for easier creation of a entity reference instance programatically.

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