Launching first dev release of 8.x
Replaced Drupal\Component\Utility\String with Drupal\Component\Utility\SafeMarkup; as it has been removed on D8 Beta 14.
#764332: Reproduce the same functionality for the e-mail address field
#1508198: Provide Username check on user page when editing their username
#1114984: Use the word "username" instead of "name" when generating messages