some helper functions

for when i started the assembler div10
in the end i did the div10 in some, so no need

lib/register/instructions/register_transfer.rb

@@ -29,5 +29,8 @@ module Register
       "RegisterTransfer: #{from} -> #{to}"
     end
 
+    def self.transfer source , from , to
+      RegisterTransfer.new source , from , to
+    end
   end
 end