Configable.rb

require 'net/http'
require 'yaml'

module Configable
  def configure(setup)
    setup.each_pair do |key,val|
      if self.respond_to? key + '='
        self.send(key + '=', val)
      else
        instance_variable_set('@' + key, val)
      end
    end
  end
end

class Github
  include Configable
  def initialize(setup)
    configure(setup)
  end
  attr_accessor :user, :pass
end

g = Github.new({'user'=>'bar','pass'=>'bim'})
puts g.user # = bar