Add helper to create and export a virtualbox machine image from virtual disk image
Add helper to create and export a virtualbox machine image from virtual disk image

timsutton/osx-vm-templates,rodm/osx-vm-templates,rodm/osx-vm-templates,timsutton/osx-vm-templates,rodm/osx-vm-templates,timsutton/osx-vm-templates,timsutton/osx-vm-templates,timsutton/osx-vm-templates,rodm/osx-vm-templates,rodm/osx-vm-templates