diff: add new authors for reference manual

[Fergus Henderson]

Estimated hours taken: 0.25

doc/reference_manual.texi:
	Add various people to the authors list, since they have all made
	substantial contributions: Peter Schachte (impurity),
	Simon Taylor (module qualifications & use_module,
	Aditi compilation, and [soon] type specialization),
	and Chris Spiers (termination analysis).

Index: doc/reference_manual.texi
===================================================================
RCS file: /home/mercury1/repository/mercury/doc/reference_manual.texi,v
retrieving revision 1.121
diff -u -r1.121 reference_manual.texi
--- reference_manual.texi	1999/02/12 04:19:15	1.121
+++ reference_manual.texi	1999/02/18 07:45:05
@@ -50,6 +50,9 @@
 @author Thomas Conway
 @author Zoltan Somogyi
 @author David Jeffery
+ at author Peter Schachte
+ at author Simon Taylor
+ at author Chris Spiers
 @page
 @vskip 0pt plus 1filll
 Copyright @copyright{} 1995-1999 The University of Melbourne.

-- 
Fergus Henderson <fjh at cs.mu.oz.au>  |  "Binaries may die
WWW: <http://www.cs.mu.oz.au/~fjh>  |   but source code lives forever"
PGP: finger fjh at 128.250.37.3        |     -- leaked Microsoft memo.