Update README.md

Adding a getting started instruction for adding xterm to a parent div and listening for data output from xterm

README.md

@@ -52,6 +52,28 @@ npm start
 
 Then open http://0.0.0.0:3000 in a web browser (use http://127.0.0.1:3000 if running under Windows).
 
+## Getting Started
+
+To attact the xterm `Terminal` to a parent div
+
+```html
+<div id="terminal"></div>
+```
+
+```js
+var term = new Terminal();
+term.open(document.getElementById('#terminal'));
+term.write('Hello from \033[1;3;31mxterm.js\033[0m $ ')
+```
+To get the data from xterm to send to a server or for proccessing you can
+
+```js
+function onDataReceived(data) {
+   // Your logic
+}
+term.on('data', onDataReceived);
+```
+
 ## Addons
 
 Addons are JavaScript modules that attach functions to the `Terminal` prototype to extend its functionality. There are a handful available in the main repository in the `dist/addons` directory, you can even write your own (though they may break when the internals of xterm.js change across versions).