Remove dependency of VirtualBox for running tests
v1.0.6
Update CHANGELOG
Move legacy guest support to Arch::SysVInit
Add systemd support in Arch::Systemd
Use hostnamectl to set hostname
Use ip and dhcpcd to setup network interfaces

* dhcp interfaces can be easily started using:
  systemctl start dhcpcd@ethX
* static interfaces can be brought up using 'ip'
Halt Arch using systemctl poweroff
Guard against net/ssh IOError

It appears that after `systemctl poweroff`, the ssh daemon goes down
too quickly and net/ssh will raise an IOError on the select call.

But the command is executed normally, the system will shutdown, and
there will be no need to forcefully turn it off using the virtualbox
driver.