Update shopping-cart example

Author: aldanor

examples/shopping-cart/README.md

@@ -4,14 +4,18 @@ See [NuclearJS: Getting Started](https://optimizely.github.io/nuclear-js/docs/01
 
 Taken (and slightly modified) from [https://github.com/voronianski/flux-comparison](https://github.com/voronianski/flux-comparison)
 
-## To Run
+## Running
 
-The compiled files are checked in simply, open the `index.html` file
+You must have [npm](https://www.npmjs.org/) installed on your computer.
+From the root project directory run these commands from the command line:
 
-## To modify
+`npm install`
 
-**Start the webpack watch task:**
+This will install all dependencies.
 
-```sh
-webpack -w
-```
+To build the project, first run this command:
+
+`npm start`
+
+After starting the watcher, you can open `index.html` in your browser to
+open the app.

examples/shopping-cart/package.json

@@ -1,14 +1,7 @@
 {
   "main": "js/app.js",
   "scripts": {
-    "start": "../node_modules/watchify/bin/cmd.js js/app.js -o build/bundle.js -v -d",
-    "build": "browserify js/app.js > build/bundle.js"
-  },
-  "browserify": {
-    "transform": [
-      "babelify",
-      "envify"
-    ]
+    "start": "./node_modules/webpack/bin/webpack.js --watch --progress"
   },
   "dependencies": {
     "nuclear-js": "^1.0.5",