Fix meta_class, sis class instance variables and class methods

after some serious recursive thinking it now actually makes sense.
The key was to change the actual type of the class that the meta_class manages
For objects it's (still) ok just to change the instance_type, but since the class object exists and has type, when adding instance variables, that actual type has to change

lib/risc/parfait_adapter.rb

@@ -85,14 +85,14 @@ module Parfait
     # 0 -based index
     def get_internal_word(index)
       return @type if index == Parfait::TYPE_INDEX
-      name = Parfait.name_for_index(self , index)
+      name = self.type.names[index]
       return nil unless name
       instance_eval("@#{name}")
     end
 
     # 0 -based index
     def set_internal_word(index , value)
-      name = Parfait.name_for_index(self , index)
+      name = self.type.names[index] #unless name.is_a?(Symbol)
       raise "not sym for #{index} in #{self}:#{self.type}:#{name.class}" unless name.is_a?(Symbol)
       instance_eval("@#{name}=value" )
       value
@@ -100,16 +100,6 @@ module Parfait
 
   end
 
-  def self.name_for_index(object , index)
-    return :type if index == 0
-    clazz = object.class.name.split("::").last.to_sym
-    cl = self.type_names[clazz]
-    keys = cl.keys
-    keys[index - 1] # -1 because type is excluded in the lists (FIX)
-    # FIXME Now that we use instance variables in parfait, they should be parsed
-    # and the type_names generated automatically
-  end
-
   # new list from ruby array to be precise
   def self.new_list array
     list = Parfait::List.new