Move description of manual organisation from Preface to Introduction

This material isn't "meta-" enough to be in the Preface, and it
supports (by its structure) some of the points that the Introduction
makes about Guile, so I think it belongs here.

* doc/ref/intro.texi (Introduction): Add `Organisation of this Manual'
  menu item and material to here...

* doc/ref/preface.texi (Preface): ...from here.

doc/ref/intro.texi

@@ -48,6 +48,7 @@ conventions that we use in this manual.
 * Interactive Programming::
 * Supporting Multiple Languages::
 * Obtaining and Installing Guile::  
+* Organisation of this Manual::
 * Typographical Conventions::          
 @end menu
 
@@ -226,6 +227,51 @@ we have included the report in the Guile distribution; see
 Language Scheme}.
 This will also be installed in your info directory.
 
+@node Organisation of this Manual
+@section Organisation of this Manual
+
+The rest of this manual is organised into the following chapters.
+
+@table @strong
+@item Chapter 1: Introduction
+This part provides an overview of what Guile is and how you can use
+it.  A whirlwind tour shows how Guile can be used interactively and as
+a script interpreter, how to link Guile into your own applications,
+and how to write modules of interpreted and compiled code for use with
+Guile.  Everything introduced here is documented again and in full by
+the later parts of the manual.  This part also explains how to obtain
+and install new versions of Guile, and how to report bugs effectively.
+
+@item Chapter 2: Programming in Scheme
+This part provides an overview of programming in Scheme with Guile.
+It covers how to invoke the @code{guile} program from the command-line
+and how to write scripts in Scheme.  It also gives an introduction
+into the basic ideas of Scheme itself and to the various extensions
+that Guile offers beyond standard Scheme.
+
+@item Chapter 3: Programming in C
+This part provides an overview of how to use Guile in a C program.  It
+discusses the fundamental concepts that you need to understand to
+access the features of Guile, such as dynamic types and the garbage
+collector.  It explains in a tutorial like manner how to define new
+data types and functions for the use by Scheme programs.
+
+@item Chapter 4: Guile API Reference
+This part of the manual documents the Guile @acronym{API} in
+functionality-based groups with the Scheme and C interfaces presented
+side by side.
+
+@item Chapter 5: Guile Modules
+Describes some important modules, distributed as part of the Guile
+distribution, that extend the functionality provided by the Guile
+Scheme core.
+
+@item Chapter 6: GOOPS
+Describes GOOPS, an object oriented extension to Guile that provides
+classes, multiple inheritance and generic functions.
+
+@end table
+
 @node Typographical Conventions
 @section Typographical Conventions
 

doc/ref/preface.texi

@@ -9,47 +9,7 @@
 
 This manual describes how to use Guile, GNU's Ubiquitous Intelligent
 Language for Extensions.  It relates particularly to Guile version
-@value{VERSION}.  The manual is divided into the following chapters.
+@value{VERSION}.
-
-@table @strong
-@item Chapter 1: Introduction
-This part provides an overview of what Guile is and how you can use
-it.  A whirlwind tour shows how Guile can be used interactively and as
-a script interpreter, how to link Guile into your own applications,
-and how to write modules of interpreted and compiled code for use with
-Guile.  Everything introduced here is documented again and in full by
-the later parts of the manual.  This part also explains how to obtain
-and install new versions of Guile, and how to report bugs effectively.
-
-@item Chapter 2: Programming in Scheme
-This part provides an overview of programming in Scheme with Guile.
-It covers how to invoke the @code{guile} program from the command-line
-and how to write scripts in Scheme.  It also gives an introduction
-into the basic ideas of Scheme itself and to the various extensions
-that Guile offers beyond standard Scheme.
-
-@item Chapter 3: Programming in C
-This part provides an overview of how to use Guile in a C program.  It
-discusses the fundamental concepts that you need to understand to
-access the features of Guile, such as dynamic types and the garbage
-collector.  It explains in a tutorial like manner how to define new
-data types and functions for the use by Scheme programs.
-
-@item Chapter 4: Guile API Reference
-This part of the manual documents the Guile @acronym{API} in
-functionality-based groups with the Scheme and C interfaces presented
-side by side.
-
-@item Chapter 5: Guile Modules
-Describes some important modules, distributed as part of the Guile
-distribution, that extend the functionality provided by the Guile
-Scheme core.
-
-@item Chapter 6: GOOPS
-Describes GOOPS, an object oriented extension to Guile that provides
-classes, multiple inheritance and generic functions.
-
-@end table
 
 @menu
 * Contributors::