start on passes

after all that booting and vm/parfait changes
passes have gone out of sync, start to fix

lib/virtual/type.rb

@@ -4,17 +4,22 @@ module Virtual
   # The Mystery Type has unknown type and has only casting methods. So it must be cast to be useful.
   class Type
     def == other
-      return false unless other.class == self.class 
+      return false unless other.class == self.class
       return true
     end
   end
-  
+
   class Integer < Type
   end
-  
+
   class Reference < Type
+    # possibly unknown value, but known class (as in methods)
+    def initialize clazz = nil
+      @of_class = clazz
+    end
+    attr_reader :of_class
   end
-  
+
   class Mystery < Type
   end