Added JS minification to Makefile

Makefile

@@ -31,6 +31,11 @@ min: all
 		printf '%-20s : ' $$f 1>&2; \
 		mincss -v -o $$f $$f; \
 	done
+	@for f in $(SCRIPTS); do \
+		echo $$f; \
+		closure-compiler --js $$f --js_output_file .tmp.js; \
+		mv .tmp.js $$f; \
+	done
 
 $(CACHE_DIR):
 	mkdir $@