translation update
Merge branch 'lang_update_257' of git://github.com/dokuwiki-translate/dokuwiki-plugin-statdisplay into pull-request-13

* 'lang_update_257' of git://github.com/dokuwiki-translate/dokuwiki-plugin-statdisplay:
  translation update

Conflicts:
	lang/de/lang.php
	lang/de/settings.php