def global_config
      tmp = {}
      global_config_files.each { |f|
        tmp.merge!(slurp_file(f) || {})      
      }
      tmp
    end
def global_config
      tmp = {}
      global_config_files.each { |f|
        tmp.merge!(slurp_file(f) || {})      
      }
      tmp
    end
get any config from our global config files