merge master into filesystem

apps/files/admin.php

apps/files/ajax/newfolder.php

apps/files/js/filelist.js

apps/files/js/files.js

apps/files/l10n/pt_PT.php

apps/files_external/l10n/sk_SK.php

apps/files_external/lib/config.php

apps/files_sharing/js/share.js

apps/files_sharing/l10n/he.php

apps/files_versions/js/versions.js

apps/files_versions/l10n/ca.php

apps/user_ldap/l10n/ru_RU.php

core/ajax/share.php

core/img/rating/s1.png

core/img/rating/s10.png

core/img/rating/s11.png

core/img/rating/s2.png

core/img/rating/s3.png

core/img/rating/s4.png

core/img/rating/s5.png