Add some attr_readers

lib/imbecile/grammar.rb

@@ -13,6 +13,10 @@ module Imbecile
     #   Tokens.
     attr_reader :tokens
 
+    # @return [Array<Rule>]
+    #   Rules.
+    attr_reader :rules
+
     def initialize(input)
       @tokens = []
       @rules = []

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+/)