Add table demo

demo/demo4.js

@@ -0,0 +1,12 @@
+const docx = require('../build');
+
+var doc = new docx.Document();
+
+const table = doc.createTable(4, 4);
+table.getCell(2, 2).addContent(new docx.Paragraph('Hello'));
+
+
+var exporter = new docx.LocalPacker(doc);
+exporter.pack('My Document');
+
+console.log('Document created succesfully at project root!');