Get of fam inst index in ifaces

Get of fam inst index in ifaces
Mon Sep 18 19:40:42 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Get of fam inst index in ifaces
  Fri Sep  8 16:31:26 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * Get of fam inst index in ifaces
    - Removes the explicit index to get unique names for derived tycons for family
      instances again, following a suggestion by SPJ.
    - We now derive the coercion tycon name from the name of the representation
      tycon, which is in the iface anyways.

    *** WARNING: Change of interface file format! ***
    ***          Recompile from scratch!          ***