Bar graph added.

node_modules/vega-cli/bin/vg2pdf

@@ -0,0 +1,12 @@
+#!/usr/bin/env node
+// Render a Vega specification to PDF, using node canvas
+const {createWriteStream} = require('fs'),
+      render = require('../src/render');
+
+render('pdf', function(canvas, arg) {
+  const file = arg._[1] || null,
+        config = arg.test ? {creationDate: new Date(2012, 0, 1)} : undefined,
+        out = file ? createWriteStream(file) : process.stdout,
+        stream = canvas.createPDFStream(config);
+  stream.on('data', chunk => { out.write(chunk); });
+}, {type: 'pdf', context: {textDrawingMode: 'glyph'}});