Remove client_key option - only use client key from knife.rb
Bind to 0.0.0.0 rather than localhost. This should probably be an option rather than a hardcoded setting, but just doing this for now
Refactor main node code to use YAML, add some custom code that rewrites our hostnames, add all recipes as well as roles to tags
Add require json for exception handling
Use the chef server url for the web ui URL