Merge branch 'master' into improve_app-management

AUTHORS

COPYING-README

apps/files/ajax/download.php

apps/files/ajax/list.php

apps/files/ajax/rename.php

apps/files/appinfo/app.php

apps/files/appinfo/routes.php

apps/files/css/files.css

apps/files/index.php

apps/files/js/file-upload.js

apps/files/js/fileactions.js

apps/files/js/files.js

apps/files/js/keyboardshortcuts.js

apps/files/l10n/cs_CZ.php

apps/files/l10n/da.php

apps/files/l10n/de.php

apps/files/l10n/de_DE.php

apps/files/l10n/gl.php

apps/files/l10n/ja_JP.php

apps/files/l10n/lv.php