Added an hostonly interface with fixed ip address for guest and host
Cleaning virtualbox interfaces on stop
typo
Moved hostonly creation in start command (handling reboot)
Moved ip calculation var
Added output redirection for a duplicate message
Add localdocker alias to /etc/hosts on setup
Facilitate '-j' when building kernel

thanks for the input of @tianon and @steeve

Signed-off-by: Tzu-Jung Lee <roylee17@gmail.com>
Add the real xz package. Closes #126