****************************************************************
JULY 27 -- Guy Blelloch
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Got rid of references to the SML/NJ lib.
Replaced ORD_KEY with TOTAL_ORDER, and moved the splay-tree
code from the SML/NJ lib to this directory.

****************************************************************
JULY 25 -- Guy Blelloch
****************************************************************

Added a new SET signature and a functor SetFromTable that
generates a SET from a Table.  Also included IntSet (a set
with integer keys).

To TABLE: added several functions, changed some names, and changed
some argument orders.  A summary is given below.
I also modified the matrix, simpcomp, and pqueue library code to account
for these changes.

  name changed:  type key -> type index
  added:         exception NoEntry
  added:         elt (curried version of find)
  changed args:  insert (from (k,v,t) to ((k,v),t))
  name changed:  delete -> deleteReturn
  added       :  delete   (does not return previous value)
  name changed:  generalUpdate -> updateReturn

  name changed:  foldr -> foldrIdx
  added       :  foldr  (does not take the index)
  name changed:  foldl -> foldlIdx
  added       :  foldl  (does not take the index)
  added       :  mapIdx
  name changed:  mapd -> filter
  added       :  filterIdx

  added       :  unionIdx, intersectIdx, diffIdx

  changed types: toList returns index as well as value

****************************************************************
JULY 19 -- Guy Blelloch
****************************************************************

Added this file and a README.html file.

Also changed the name of the function "updt" to "generalUpdate".
The semantics of the function was not changed.