[Clipart] Use 7Zip for the Open Cliparts distribution

[Daniel Carrera]

Jon Phillips wrote:

>>The problem with 7-Zip is that it only runs on Windows. So using it 
>>would leave out GNU/Linux, Mac OS X and all Unix.
> 
> Yeah, so I would say that we should not support this new compression
> format in favor of our current ones. However, if someone wants to
> provide a 7zip version of our repository, I wouldn't be opposed to
> hosting this. Others?

Sure, why not.

Cheers,
Daniel.