Inital commit of server setup play.

Playbook that performs basic tasks for machine setup.
requires that you set the variables 'new_user' and
'new_user_default_pass' which can be done individually
or set in group_vars/all. A password is set but this
play
sets up passwordless sudo and sets
'PasswordAuthentication no'
in the sshd_config.

You should also replace
roles/ssh/files/ca.pub file with your
own
CA public key.