rename word_length to padded length

with word_length i was never sure if it was the padded version or not

lib/parfait/indexed.rb

@@ -99,8 +99,8 @@ module Parfait
     # This is off course 0 for a list, unless someone squeezed an instance variable in
     # but additionally, the amount of data comes on top.
     # unfortuntely we can't just use super because of the Padding
-    def word_length
-      padded_words( get_layout().get_length() +  get_length() )
+    def padded_length
+      padded_words( get_layout().instance_length +  get_length() )
     end
 
     def each

lib/parfait/object.rb

@@ -92,8 +92,8 @@ module Parfait
       get_layout().variable_index(name)
     end
 
-    def word_length
-      padded_words( get_layout().get_length() )
+    def padded_length
+      padded_words( get_layout().instance_length )
     end
 
     # Object

lib/register/parfait_adapter.rb

@@ -28,8 +28,8 @@ class Symbol
     #puts "LL #{l.class}"
     l
   end
-  def word_length
-    padded to_s.length
+  def padded_length
+    padded to_s.length + 4
   end
   # not the prettiest addition to the game, but it wasn't me who decided symbols are frozen in 2.x
   def cache_positions