adding Tue False and Nil Class to Parfait

and boot

lib/risc/boot.rb

@@ -129,10 +129,15 @@ module Risc
                         :return_address => :Integer, :return_value => :Integer,
                         :caller => :Message , :name => :Word , :arguments => :NamedList },
           :Integer => {},
+          :TrueClass => {},
+          :FalseClass => {},
+          :NilClass => {},
           :Object => {},
           :Kernel => {}, #fix, kernel is a class, but should be a module
           :BinaryCode => {:char_length => :Integer} ,
-          :Space => {:classes => :Dictionary , :types => :Dictionary , :first_message => :Message},
+          :Space => {:classes => :Dictionary , :types => :Dictionary ,
+                     :first_message => :Message , single_true: :TrueClass,
+                     single_false: :FalseClass , single_nil: :NilClass},
           :NamedList => {},
           :Type => {:names => :List , :types => :List  ,
                     :object_class => :Class, :methods => :List } ,