Add section picture to the section title page on printed Bookes only.

I guess these could be added to be website, but right now I don't think
they'd add much. On paper, they fill some blank space.

dottes.tex

@@ -75,6 +75,16 @@
     \raisebox{-.4\height}{\includegraphics[width=0.77\textwidth]{#3}} \\
 }
 
+% Show the section graphic.
+% Args are the graphic filename.
+\newcommand{\showsectiongraphic}[1]{%
+  \vfill
+  \begin{center}
+  \includegraphics[width=0.25\textwidth,keepaspectratio]{#1}
+  \end{center}
+  \vfill
+}
+
 % ----- Paper size document setup
 
 \input{docsetup.tex}

dottes.tex.section-tunes

@@ -13,6 +13,7 @@
 
 \vspace*{\fill}
 
+\showsectiongraphic{@SECTION@-image.jpg}
 \input{@SECTION@-intro.tex}
 
 \newpage

makeBooke.sh

@@ -65,13 +65,13 @@ do
     # Section name - strip any instrument name off the end.
     sectionname=${1/-*/}
 
-    for item in title subtitle instrument
+    for item in title.txt subtitle.txt instrument.txt image.jpg
     do
-        rm -f $builddir/$1-$item.txt
-        if [ -r $section/$item.txt ]; then
-            cp $section/$item.txt $builddir/$1-$item.txt
+        rm -f $builddir/$1-$item
+        if [ -r $section/$item ]; then
+            cp $section/$item $builddir/$1-$item
         else
-            touch $builddir/$1-$item.txt
+            touch $builddir/$1-$item
         fi
     done
     for item in intro