Contributing section update

Author: mderrick

README.md

@@ -133,6 +133,21 @@ All children components receive the following methods via props:
 - `fullscreen`
 - `setVolume`
 
+## Contributing
+
+### Dev Setup
+
+To run a server with hot module replacement:
+
+```bash
+    $ npm install
+    $ cd demo
+    $ npm install
+    $ npm run dev-server
+```
+
+Open [http://localhost:8080](http://localhost:8080). You can now modify the files in both `src` and `demo/src`.
+
 ## Thank You
 
 <img src="http://mderrick.github.io/react-html5video/browserstack.png?v=1" height="22" width="100" />

demo/package.json

@@ -4,7 +4,8 @@
   "description": "",
   "main": "entry.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "dev-server": "node server.js"
   },
   "author": "",
   "license": "ISC",