move machine to module level

makes for shorter, more concise, access
also remove one more bug possibility
(reinitiation)

lib/virtual/compiled_method_info.rb

@@ -37,7 +37,7 @@ module Virtual
     def self.create_method( class_name , method_name , args)
       raise "uups #{class_name}.#{class_name.class}" unless class_name.is_a? Symbol
       raise "uups #{method_name}.#{method_name.class}" unless class_name.is_a? Symbol
-      clazz = Machine.instance.space.get_class_by_name class_name
+      clazz = Virtual.machine.space.get_class_by_name class_name
       raise "No such class #{class_name}" unless clazz
       method = clazz.create_instance_method( method_name , Virtual.new_list(args))
       method.info = CompiledMethodInfo.new