Find configuration values gracefully

Author: Peter Benjamin

source/bin/restacker

@@ -111,13 +111,13 @@ end
 options, unparsed = Parser.parse(ARGV)
 
 # set the username to $USER if not specified
-options[:username] = options[:username] || RestackerConfig.default_user || ENV['USER']
+options[:username] = RestackerConfig.find_user(options)
 
 begin
   action = unparsed.pop
   puts(VERSION) || exit(0) if options[:version]
   usage("Please specify an ACTION") && exit(0) if action.nil?
-  plane = RestackerConfig.load_config(options)
+  plane = RestackerConfig.get_plane(options)
 
   if action == 'configure'
     printf "%-s (%s)\n", Rainbow("CONFIGURING PLANE").white.bright.underline, plane