use intl's native normalizer_normalize() in case the module is available
Step one, open guest layout for different styles.

Conflicts:
	core/templates/layout.guest.php

Step one, open guest layout for different styles.
remove icon styles from apps.css as they are in icons.css
use same shade of grey for active navigation items and hovering
remove obsolete language files
Merge pull request #10960 from owncloud/use-intl-module-master

use intl's native normalizer_normalize() in case the module is available
Merge pull request #11026 from owncloud/apps-styles-update

Apps styles update
Merge pull request #10109 from owncloud/issue_#9793_guestlayout

Step one, open guest layout for different styles.
Merge pull request #11060 from owncloud/rmobslang

remove obsolete language files
Cleanup filesystem setup code