Clear old LaTeX intermediate files before building a booke.

Old ones can cause the build to error.

makeBooke.sh

@@ -29,6 +29,10 @@ shift
 
 mkdir -p $builddir
 
+# Clear any XeLaTeX intermediate/generated files in case old ones
+# interfere with the build. This has been known to happen.
+rm $builddir/dottes.*
+
 if [ $# -eq 1 ]; then
     bookename=$1
     for item in title subtitle instrument