The current repository contains both sensitive contents and contents that will soon be published. We should dump the whole repository, filter all the sensitive stuff out and restore the rest into a new SVN-repository. This way we keep the complete history while removing the sensitive things reliably (even from the history).
Already a few days ago, I migrated all to-be-published contents into the new repository: https://dev.nightlabs.org/svn/public/cumulus4j