Fixed typo and extra spaces in README.md
Rename *.menu_links.yml files to *.links.menu.yml.
getCancelRoute() has been renamed to getCancelUrl().
Form state is now an object.
The list_boolean field has been merged into boolean.
Replace $form_state['redirect_route'] with setRedirect().
Add the commerce_currency entity type.
Allow currencies to be enabled / disabled.
As for Issue #2309221 Drupal\Core\Datetime\Date should be renamed to DateFormatter.