removed unused NamedList

args and locals got inlined into message, forgot to delete then
ripples out due to type creation
small type class api change, more ripples, but also more consistent

lib/parfait/space.rb

@@ -151,10 +151,17 @@ module Parfait
 
     # this is the way to instantiate classes (not Parfait::Class.new)
     # so we get and keep exactly one per name
+    #
+    # The superclass must be known when the class is created, or it raises an error.
+    # The class is initiated with the type of the superclass (hence above)
+    #
+    # Only Vool::ClassExpression really ever creates classes and "grows" the type
+    # according to the instances it finds, see there
+    #
     def create_class( name , superclass = nil )
       raise "create_class #{name.class}" unless name.is_a? Symbol
       superclass = :Object unless superclass
-      raise "create_class #{superclass.class}" unless superclass.is_a? Symbol
+      raise "create_class failed for #{name}:#{superclass.class}" unless superclass.is_a? Symbol
       type = get_type_by_class_name(superclass)
       c = Class.new(name , superclass , type )
       @classes[name] = c