Revert "German language update"

This reverts commit ba09710ad34bb383ae3526e84490a3d545f78866.

Conflicts:
	lib/plugins/authad/lang/de/settings.php
de/de-informal: Re-apply the updates of ba09710ad34bb383ae3526e84490a3d545f78866
de/de-informal: Re-add TOC suffixes (Will be removed after the release
again)
de/de-informal: Change "Vorlage" to "Template"
Merge pull request #213 from lupo49/master

de/de-informal language updates for several components.