Mon Sep 18 19:24:27 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Indexed newtypes
  Thu Aug 31 22:09:21 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * Indexed newtypes
    - This patch makes indexed newtypes work
    - Only lightly tested
    - We need to distinguish between open and closed newtypes in a number of 
      places, because looking through newtypes doesn't work easily for open ones.