README for matplotlib fonts problemns

Makefile

@@ -36,6 +36,9 @@ watchpdf :
 watchscript :
 	while true; do ! make -s -q script && make script; sleep 0.5; done
 
+cleanplots:
+	for sd in $(SUBDIRS); do $(MAKE) -C $$sd/lecture cleanplots; done
+
 cleantex:
 	rm -f *~  $(BASENAME).aux $(BASENAME).log $(BASENAME).out $(BASENAME)-solutions.tex $(BASENAME).toc $(BASENAME).lo?  $(BASENAME).idx $(BASENAME)-term.i* $(BASENAME)-enterm.i* $(BASENAME)-code.i*
 	for sd in $(SUBDIRS); do $(MAKE) -C $$sd/lecture cleantex; done