run includeos without sudo by proper permissions management

[KristianJerpetjon]

Enable all scripts to be run without sudo by setting the correct udev rules and setting the user to kvm this should be documented for ubuntu and tested. The scripts should probably still be able to run with sudo if that option is passed

[fwsGonzo]

I think its still needed for TAP device (which is not easy to do), but yes, its really easy to add user to kvm group.