message: Alt attribute for the ITZ logo in the footer
diff: </ul>
  </div>
  <div class="col22 footer-col">
  - {{ if eq .Lang "de" }}<a href="{{ "/verein/transparenz" | absURL }}"><img src="/img/logo-itz.svg" class="itz-logo"></a>{{ end }}
  + {{ if eq .Lang "de" }}<a href="{{ "/verein/transparenz" | absURL }}"><img src="/img/logo-itz.svg" alt="Logo der ITZ (Initiative Transparente Zivilgesellschaft)" class="itz-logo"></a>{{ end }}
  </div>
  </div>
  <div class="clearfix"></div>
  