Add NEWS and concept index entries for traps infrastructure and Emacs support.

doc/ref/ChangeLog

@@ -1,3 +1,10 @@
+2008-05-05  Neil Jerram  <neil@ossau.uklinux.net>
+
+	* scheme-using.texi (Using Guile in Emacs): Add concept index
+	entries `GDS' and `Emacs'.
+
+	* api-debug.texi (Debugging): Add concept index entry `Debugging'.
+
 2008-05-04  Ludovic Courtès  <ludo@gnu.org>
 
 	* guile.texi (Guile Modules): Include `autoconf.texi'.

doc/ref/api-debug.texi

@@ -8,6 +8,7 @@
 @node Debugging
 @section Debugging Infrastructure
 
+@cindex Debugging
 In order to understand Guile's debugging facilities, you first need to
 understand a little about how the evaluator works and what the Scheme
 stack is.  With that in place we explain the low level trap calls that

doc/ref/scheme-using.texi

@@ -359,6 +359,8 @@ debugger to continue.)
 @node Using Guile in Emacs
 @section Using Guile in Emacs
 
+@cindex GDS
+@cindex Emacs
 There are several options for working on Guile Scheme code in Emacs.
 The simplest are to use Emacs's standard @code{scheme-mode} for
 editing code, and to run the interpreter when you need it by typing