added example describing the theme options

Makefile

@@ -0,0 +1,38 @@
+BASENAME=lines-example
+
+TEXFILE=$(BASENAME).tex
+PDFFILE=$(BASENAME).pdf
+
+all: talk again watchtalk clean cleanup cleanplots help
+
+talk: $(PDFFILE)
+$(PDFFILE): $(TEXFILE) beamer*.sty
+	pdflatex -interaction=scrollmode $< | tee /dev/stderr | fgrep -q "Rerun to get cross-references right" && pdflatex -interaction=scrollmode $< || true
+
+again :
+	pdflatex $(TEXFILE)
+
+
+watchtalk :
+	while true; do ! make -q talk && make talk; sleep 0.5; done
+
+
+clean :
+	rm -f *~
+	rmtex $(BASENAME)
+	rm -f $(PYTHONPDFFILES)
+
+cleanup : clean
+	rm -f $(PDFFILE)
+
+help : 
+	@echo -e \
+	"make talk:       make the pdf file of the talk.\n"\
+	"make again:      run latex and make the pdf file of the talk,\n"\
+        "                 no matter whether you changed the .tex file or not.\n\n"\
+	"make watchtalk:  make the pdf file of the talk\n"\
+        "                 whenever the tex file or the plots are modified.\n"\
+	"make clean:      remove all intermediate files,\n"\
+        "                 just leave the source files and the final pdf file.\n"\
+	"make cleanup:    remove all intermediate files as well as\n"\
+        "                 the final pdf file.\n"