I18N: Updated German GUI translation.
DOCS: Updated German README (Liesmich) and NEWS (Neues).
Liesmich now based on README SHA1 ID: 0caa3c0ab82c2868091ce28438bc1b8e8ced770d
Neues now based on NEWS SHA1 ID: 386596ca9670ce159a6c07811b739ba73376abcf