Allow for more VPS options without diluting simplicity

[robbintt]

This might be a good sample project to work from: https://github.com/nusenu/ansible-relayor

SIMPLICITY IS PARAMOUNT. THIS ISN'T A PROJECT INTENDED FOR THE END USER TO BE REQUIRED TO MAKE ANY CHOICES DURING SETUP.

[danvideo]

@robbintt cool project. regarding "more vps options", might want to consider using hashicorp's packer, an easy way to facilitate creation with various cloud apis (aws/gcp/azure), on top of digitalocean.