fix parfait test

lib/parfait/hash.rb

@@ -1,5 +1,7 @@
 # almost simplest hash imaginable. make good use of arrays
-class Hash
+module Parfait
+end
+class Parfait::Hash
   def initialize
     @keys = Array.new()
     @values = Array.new()

lib/salama.rb

@@ -7,4 +7,6 @@ require "virtual/machine"
 require "ast/all"
 require "sof/all"
 require "register/register_machine"
-require_relative "stream_reader"
+require_relative "stream_reader"
+
+require_relative "parfait/hash"