Could we use something better than zip for the dmd package?

[Kagamin]

> But not without installing 3rd party software. Windows can 
> handle zip files out of the box. It can't handle the others. 
> rar would have exactly the same problem as 7z files (though 
> from what I've see rar files are much more commonly used). We 
> _could_ use a file format other than zip, but then we'd be 
> requiring that the user download a 3rd party app just to be 
> able to open the file, which is _not_ the case with zip.

Availability is achieved by native installers, and AFAIK we have 
them - installers for Mac, Win, and a bunch for Lin. 
Copy-deployment is an advanced format, and I think it's pretty ok 
for it to be 7z. It's not very easy to begin with: you have to 
figure out how to install it - it's a matter of convention which 
is yet to get, where to install it, cope with privilege 
restrictions etc.