jpn-(eng|fra|rus|deu): correct copyright information

[humenda]

According to http://www.edrdg.org/edrdg/licence.html, the copyright holders are:

Copyright over the documents covered by this statement is held by James William BREEN and The Electronic Dictionary
Research and Development Group.

The header of e.g. jpn-eng says:

      <p>Copyright (C) 1994-2016 by various authors listed below.</p>
      <p>Available under the terms of the <ref target="http://creativecommons.org/licenses/by-sa/3.0/">Creative Commons Attribution-Share Alike Licence (V3.0)</ref>.</p>
    </availability>

Correct would be the year range 2000-2016. Please correct this information with the next import.

[humenda]

Sorry, jpn-deu is not affected.