GoatOS base installer

Iitial chef cookbooks and scripts to bootstrap a node with GoatOS base system (i.e. unprivileged LXC  and haproxy)

```sh
# syntax
 bundle exec ./bin/goatos FQDN -n CHEF_NODE_NAME -p SSH_PASSWORD -u SSH_USER 
# example. make a virtual box vm (ubuntu 14.04) GoatOS base system
 bundle exec ./bin/goatos  192.168.1.61 -n test -p controller -u controller 
```
@medhamsh we need to add support for key based auth, then aws would work fine as well
@nileshbairagi review please.