Issue #2308549 by mgifford: Added Document accessibility features in Image.
Issue #2329851 by lanchez, lauriii, Jolidog | davidhernandez: Move miscellaneous system classes from preprocess to templates.
Issue #2215543 by Antti J. Salminen, mrjmd, alexrayu, olemedia | joelpittet: Replace strong tag with CSS in template_preprocess_authorize_report and remove id..
Issue #2123867 by plach, vijaycs85, kfritsche, YesCT, LinL, larowlan | yched: Simplify/cleanup language handling in EntityFormController.
Revert "Issue #2267551 by catch | tim.plunkett: PHP 5.4.5 needed to avoid zend failure when using autoloaded traits."

This reverts commit 8d97ffff06e643d0508be610284bed57bdbf53df.
Issue #2294313 by Ieva Uzule, rachel_norfolk, nathanlawson91, xadag, er.pushpinderrana, Dominique CLAUSE, marcus7777: Email is asked before user name in SiteConfigureForm.
Issue #2201789 by joelpittet, jjcarrion, stefanos.petrakis, wiifm, Geizt, lussoluca | Cottser: Don't print '_theme()' in twig_debug output.