Documentation: Manual images sorted

.. example on the cover page of the manual

.. we need them to follow a naming convention
   if section-keyword.pdf, e.g. 0-icon.pdf for
   the icon on the title page (section 0).

doc/user/GC3-Manual.texinfo

@@ -11,6 +11,8 @@ Copyright @copyright{} 2013 Mark Liversedge
 @end copying
 
 @titlepage
+@image{"image/0-icon",140pt,140pt}
+@vskip 20pt
 @title Golden Cheetah User Manual
 @c @subtitle subtitle-if-any
 @c @subtitle second-subtitle
@@ -270,13 +272,13 @@ Intro and explain opening the Preferences Pane
 @c ********************************************************************************
 @c Appendices
 @c ********************************************************************************
-@chapter APPENDICES
-@node APPENDICES
+@unnumbered Appendix A Supported Devices, Formats & Services
+@unnumbered B Metrics Reference
+@unnumbered B Data Filtering Reference
+@unnumbered C Glossary & Resources
+@unnumbered D OS Specifics (Directories, Drivers and Permissions)
 
-@section A Supported Devices, File Formats and Services
-@section B Metrics Reference
-@section B Data Filtering Reference
-@section C Glossary and Useful Resources (incl. link to FAQ)
-@section D OS Specifics (Directories, Drivers and Permissions)
+@unnumbered Index
+@printindex cp
 
 @bye

doc/user/image/README

@@ -0,0 +1,10 @@
+We only have images for the Manual since they are so large and
+consume lots of disk space etc.
+
+Each image must be a PDF file, and to make it easier to manage
+and find images we name them;
+
+section-keyword.pdf
+
+e.g.
+0-icon.pdf       - the gc icon image on the first page (section 0)