Add example configuration YAML file
Parse YAML config file when present, warn that .cfg is deprecated
Update docs/changelog to reflect YAML requirement
Expand template arguments from .yaml file

This allows for logically grouping commonly paired commands.  e.g.
if you have a staging environment in the DFW datacenter and a 'base'
role you can run

fix-rackspace staging-dfw base --name=web-n01.staging

to bootstrap a new node
Add HKG support
Change name of config.yaml to rackspace.yaml
Allow rackspace.yml if you don't like .yaml files
Don't pass templates to the create command (makes output verbose)
Update README to describe template use
Update Changelog for templates.