Adding a --add-package-list filename

While using vm-builder, there are different kind of options. In many cases, you will have a bunch of standard options related to your network installations, standard packages, names, ... But there are chances that you will want to have different packages for different vms. Adding manually --add-pkg is a nice option. However, I think that it should be possible to provide a list of package in a file. Hence the proposal for --add-package-list filename . There should be one package per line in the file.

Regards,

Arnaud