Add GraphicConverter v9.4
update pagico to version 6.8.1637

and re-use version string
Merge pull request #7031 from PierreLvx/graphicconverter

Add GraphicConverter v9.4
Merge pull request #7045 from rolandwalker/update_pagico

update pagico to version 6.8.1637
Add ncMeta 1.0