derive binary code form word

long ago hacked the binary code to use integers (thus forsaking correct
arm binaries)
Finally fix by deriving from Word which now has correct binary access
Dumped binary.name in the process, that is available from the method

lib/parfait/word.rb

@@ -152,9 +152,13 @@ module Parfait
       "'" + to_s + "'"
     end
 
+    def padded_length
+      padded( 4 * get_layout().instance_length + self.char_length  )
+    end
+
     private
     def check_length
-      raise "Length out of bounds #{self.char_length}" if self.char_length > 32
+      raise "Length out of bounds #{self.char_length}" if self.char_length > 108
     end
   end
 end