Added an in-terminal qr code to gulp:serve

You can scan this with your phone to open your project.

Useful if you're developing on a mobile device. Indispensable if you're developing on several mobile devices and changing wifi networks frequently.

![image](https://cloud.githubusercontent.com/assets/1147390/5544980/a5f568ce-8ada-11e4-8b91-5b779dac12f8.png)