Issue #2100343 by Berdir, fago, martin107, visabhishek, sriharsha.uppuluri, Yorirou: Remove 'fieldable' key in entity definitions in favour of 'field_ui_base_route'.
Issue #2346421 by yched: Fixed WTF with getTargetEntityId() / getBundle().
Issue #2346249 by rteijeiro: Fixed wrong escaped errors in Installer - Database settings.
Issue #2346297 by fago: Move getting option providers to field definitions.