enabling a few pandoc extensions

Makefile

@@ -2,10 +2,16 @@ SHELL=/bin/bash
 
 TARGETS = out/Paradigmen-001.pdf
 
+FROM_FORMAT = markdown+grid_tables+raw_tex+table_captions
+
 all: $(TARGETS)
 
 %.pdf: %.md
-	pandoc --pdf-engine=xelatex -o $@ $<
+	pandoc --from $(FROM_FORMAT) --pdf-engine=xelatex -o $@ $<
 
 out/%.pdf: %.md
-	pandoc --pdf-engine=xelatex -o $@ $<
+	pandoc --from $(FROM_FORMAT) --pdf-engine=xelatex -o $@ $<
+
+clean:
+	rm -f $(TARGETS)
+.PHONY: clean