Merge pull request #148 from nuest/dev

added new box for contributors to about page...
Update lang_de.php
Update lang_de.php
Update lang_de.php
Update lang_de.php
Update lang_en.php
Update lang_de.php

filled new block with supporter content
Update lang_en.php

filled new block with supporter content
Update lang_en.php
Update lang_de.php
changed headlines in terms.php to use <h> tags, added anchors
removed "under_construction" text snippet
edited dataccess page