rename locals from type to role in message

lib/register/boot.rb

@@ -115,7 +115,7 @@ module Register
     def type_names
        {  :Word => {:char_length => :Integer} ,
           :List => {:indexed_length => :Integer} ,
-          :Message => { :next_message => :Message, :receiver => :Object, :named_list => :NamedList ,
+          :Message => { :next_message => :Message, :receiver => :Object, :locals => :NamedList ,
                         :return_address => :Integer, :return_value => :Integer,
                         :caller => :Message , :name => :Word , :indexed_length => :Integer },
           :MetaClass => {:object => :Object},

lib/register/register_value.rb

@@ -99,7 +99,7 @@ module Register
 
   # if a symbol is given, it may be one of the four objects that the vm knows.
   # These are mapped to register references.
-  # The valid symbols (:message, :self,:named_list,:new_message) are the same that are returned
+  # The valid symbols (:message, :self,:locals,:new_message) are the same that are returned
   # by the slots. All data (at any time) is in one of the instance variables of these four
   # objects. Register defines module methods with the same names (and _reg)
   def self.resolve_to_register reference