use factory to generte intergers in space

start with just integer factory in space
change all the hand-out code
still #14

lib/risc/parfait_boot.rb

@@ -163,9 +163,8 @@ module Parfait
       Factory: { for_type: :Type , next_object: :Object , last_object: :Object ,
               reserve: :Object , attribute_name: :Word },
       ReturnAddress: {next_integer: :ReturnAddress},
-      Space: {classes: :Dictionary , types: :Dictionary ,
+      Space: {classes: :Dictionary , types: :Dictionary , factories: :Dictionary,
               next_message: :Message , messages: :Message ,
-              next_integer: :Integer,  integers: :Integer ,
               next_address: :ReturnAddress ,addresses: :ReturnAddress ,
               true_object: :TrueClass, false_object: :FalseClass , nil_object: :NilClass},
       TrueClass: {},