Staffsize is now centralised in 'lilysettings.ly'.

Caveat: you need to run 'make clean' first for a new staffsize to be
picked up.

Makefile

@@ -2,7 +2,7 @@ OUTDIR=out
 PDFDIR=pdf
 FILE = music_booklet
 GITINFO=revision.tex
-LILY_PDF = lilypond-book --pdf -o $(OUTDIR)
+LILY_PDF = lilypond-book --process="lilypond -dinclude-settings=lilysettings.ly" --pdf -o $(OUTDIR)
 PDF=cd $(OUTDIR) && pdflatex --enable-pipes --shell-escape $(FILE).tex
 INDEX=cd $(OUTDIR) && makeindex $(FILE).tex
 REVISIONINFO = `git log -1 --format="%h"`
@@ -17,6 +17,7 @@ VPATH = \
 all: book
 
 book: $(OUTDIR) $(PDFDIR) $(GITINFO)
+	cp lilysettings.ly  $(OUTDIR)/
 	cp headfoot.tex $(OUTDIR)/
 	cp settings.tex $(OUTDIR)/
 	cp -r license/ $(OUTDIR)/