Ability to save and load virtual machine boxes

by Jovanka for GNOME

Implementing save and load the VM will enable the user to save the current state of the VM to an on-disk file. Restoring this file will make the VM continue from where it was left off. Saving the VM and it's state will also provide a way to load the file onto another machine. A part of the proposal is enabling downloadable ready-made VM offering the users remote repository where they could download and use the VM easily.