Issue #2050113 by swentel, longwave, Hydra, yched, marthinal, netsensei: PHP notice on multiple items image field.

Issue #1892530 by amateescu, larowlan, grisendo, pwolanin: XSS in image file description (forward port of SA-CORE-2013-003).

Issue #2050835 by Berdir | yched: Move Widget, Formatter, and FieldType plugin types to the Core\Field system.

Issue #2051923 by Berdir, dixon_, plach: Rename \Drupal\Core\Entity\Field\Field, related subclasses and interfaces to *FieldItemList.

Issue #2056405 by plopesc, yched: Let field types provide their support for 'default values' and associated input UI.

Issue #2009580 by pplantinga, Samvel, hussainweb, andypost, siccababes: Replace theme() with drupal_render() in image module.

Issue #2021817 by effulgentsia, yched: Make widgets / formatters work on EntityNG Field value objects.

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

Issue #625958 by slashrsm, quicksketch, eojthebrave, droplet, danlinn, czigor: Support Uploading Multiple Files for HTML5 Browsers via #multiple attribute.

Issue #1849752 by effulgentsia, Berdir, jibran, neclimdul: Abstract non-Drupal-specific parts of AnnotatedClassDiscovery into a Drupal\Component base class.

Issue #1751174 by zuuperman, yched: Convert file and image module widgets / formatters to Plugin system.