Add some attr_readers

lib/imbecile/grammar/rule.rb

@@ -3,8 +3,12 @@ module Imbecile
 
     class Rule
 
+      attr_reader :name
+
       attr_reader :components
 
+      attr_reader :code
+
       def initialize(name, rule, code)
         @name = name
         rule_components = rule.split(/\s+/)