message: Updated readme to include ES6 syntax
diff: @@ -48,7 +48,7 @@ _Note: After v4.5.0, support for the [Bower](https://bower.io) package manager h
  #### NPM Install
  -```
  +```sh
  $> npm install pixi.js
  ```
  @@ -112,18 +112,17 @@ before submitting changes.
  ```js
  // The application will create a renderer using WebGL, if possible,
  // with a fallback to a canvas render. It will also setup the ticker
  -// and the root stage PIXI.Container.
  -var app = new PIXI.Application();
  +// and the root stage PIXI.Container
  +const app = new PIXI.Application();
  // The application will create a canvas element for you that you
  -// can then insert into the DOM.
  +// can then insert into the DOM
  document.body.appendChild(app.view);
  // load the texture we need
  -PIXI.loader.add('bunny', 'bunny.png').load(function(loader, resources) {
  -
  - // This creates a texture from a 'bunny.png' image.
  - var bunny = new PIXI.Sprite(resources.bunny.texture);
  +PIXI.loader.add('bunny', 'bunny.png').load((loader, resources) => {
  + // This creates a texture from a 'bunny.png' image
  + const bunny = new PIXI.Sprite(resources.bunny.texture);
  // Setup the position of the bunny
  bunny.x = app.renderer.width / 2;
  @@ -133,11 +132,11 @@ PIXI.loader.add('bunny', 'bunny.png').load(function(loader, resources) {
  bunny.anchor.x = 0.5;
  bunny.anchor.y = 0.5;
  - // Add the bunny to the scene we are building.
  + // Add the bunny to the scene we are building
  app.stage.addChild(bunny);
  // Listen for frame updates
  - app.ticker.add(function() {
  + app.ticker.add(() => {
  // each frame we spin the bunny around a bit
  bunny.rotation += 0.01;
  });
  @@ -153,13 +152,13 @@ the only time you should need to build PixiJS is if you are developing it.
  If you don't already have Node.js and NPM, go install them. Then, in the folder where you have cloned
  the repository, install the build dependencies using npm:
  -```
  +```sh
  $> npm install
  ```
  Then, to build the source, run:
  -```
  +```sh
  $> npm run build
  ```
  @@ -167,7 +166,7 @@ $> npm run build
  The docs can be generated using npm:
  -```
  +```sh
  $> npm run docs
  ```
  