[m-dev.] for review: update NEWS and WORK_IN_PROGRESS

[Fergus Henderson]

NEWS:
	Document the support for abstract instance declarations.

--- NEWS.old	Tue Oct 26 02:56:15 1999
+++ NEWS	Tue Oct 26 02:58:07 1999
@@ -17,6 +17,12 @@
   see the "Known bugs and limitations" section of the "Existential types"
   chapter of the Mercury Language Reference Manual.
 
+* We now allow abstract instance declarations.
+
+  You can declare in the interface of a module that a type is an
+  instance of a particular type class, and provide the definition
+  of that instance in the implementation section of that module.
+
 * We now support a simple form of user-defined infix operators.
   
   Terms in the form of x `fun` y are transformed into fun(x, y).  `fun`
-- 
Fergus Henderson <fjh at cs.mu.oz.au>  |  "I have always known that the pursuit
WWW: <http://www.cs.mu.oz.au/~fjh>  |  of excellence is a lethal habit"
PGP: finger fjh at 128.250.37.3        |     -- the last words of T. S. Garp.
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