Add Quick Start guide and Vagrant Cloud support for end users to get up and running quicker.

* closes @lonniev request in #9 with addition of Quick Start guide
* resolves request for documented config.ssh.pty by @poflynn in # 11
* Note: contrib/vagrantcloud now contains boxes for available SoftLayer OS templates as the Vagrant Cloud account I setup is configured to pull the boxes from GitHub so theres no need to use a paid account.