Modifies makefile

Makes clean also delete _minted* directories

Stops make from stopping early if files are not there when cleaning

Makefile

@@ -9,10 +9,6 @@ with-notes.pdf: with-notes.latex
 with-notes.latex: main.latex $(GRAPHICS_FILES)
 	sed 's/\%showNotes\%//' main.latex > with-notes.latex
 
-clean:
-	rm *.aux *.log *.out *.toc *.nav *.snm *.pdf *.vrb
-	rm with-notes.latex
-
 auto-images/auto-xkcd-%.png:
 	mkdir -p auto-images
 	curl https://xkcd.com/$*/info.0.json 2> /dev/null | jq '.img' | sed 's/.png/_2x.png/g' | xargs curl -s -o $@
@@ -24,7 +20,13 @@ auto-images/auto-shell-%.svg: shell-output/%.out
 	mkdir -p auto-images
 	cat shell-output/$*.out | bin/ansi2svg > $@
 
+clean:
+	- rm *.aux *.log *.out *.toc *.nav *.snm *.pdf *.vrb
+	-rm -rf _minted-main
+	-rm -rf _minted-with-notes
+	- rm with-notes.latex
+
 clean-images:
-	rm -rf auto-images/
+	- rm -rf auto-images/
 
 clean-all: clean clean-images