rename old layout()

new is called get_layout, but keep old around for
checking

lib/parfait/class.rb

@@ -62,7 +62,7 @@ module Parfait
     end
 
     @@CLAZZ = { :names => [:name , :super_class_name , :instance_methods] , :types => [Virtual::Reference,Virtual::Reference,Virtual::Reference]}
-    def layout
+    def old_layout
       @@CLAZZ
     end
     def mem_length

lib/parfait/space.rb

@@ -37,7 +37,7 @@ module Parfait
 
     @@SPACE = { :names => [:classes,:objects,:symbols,:messages, :next_message , :next_frame] ,
                 :types => [Virtual::Reference,Virtual::Reference,Virtual::Reference,Virtual::Reference,Virtual::Reference]}
-    def layout
+    def old_layout
       @@SPACE
     end
 

lib/parfait/word.rb

@@ -8,6 +8,10 @@ module Parfait
   # Words are constant, maybe like js strings, ruby symbols
   # Words are short, but may have spaces
 
+  # Words are objects, that means they carry Layout as index 0
+  # So all indexes are offset by one in the implementation
+  # Object length is measured in non-layout cells though
+
   # big TODO , this has NO encoding, a char takes a machine word. Go fix.
   class Word < Object
     # initialize with length. For now we try to keep all non-parfait (including String) out