also install the new PNG icon

Makefile

@@ -48,7 +48,7 @@ pages:
 	mkdir -p public/foils public/notes
 	cp -r html public/
 	cp foils/the_m_irabilos.png public/foils/
-	cp notes/*.htm public/notes/
+	cp notes/*.htm notes/*.png public/notes/
 	cp tex/workshop.pdf public/
 	sed 's!\.\./!!g' <build/pages-stub.htm >public/index.html