Bar graph added.

node_modules/vega-lite/bin/vl2png

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+# Expects the path to a Vega-Lite specification as the first argument.
+# Passes remaining arguments to vg2png using npx.
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+# only passes the first argument to vl2vg
+$DIR/vl2vg $1 | npx -p vega vg2png '' ${@:2}