Add `quick-start.sh` to backdrop root

- I got quite tired of the `./start-app` way of life, passing two arguments to the same script twice.
- Starts both read and write on the expected ports (3038/3039), and takes no arguments
- This is an alternative to bowl-ing the app, for clods like me who can't think outside of the repository the app sits in.

![](http://37.media.tumblr.com/2187eb487e7b292fbdd712af5b37f297/tumblr_n4d46tGZVi1rc8zlqo1_500.jpg)
![](http://37.media.tumblr.com/b27d99d97fc259a4111c120da9dfbec8/tumblr_n4d46tGZVi1rc8zlqo2_500.jpg)
![](http://31.media.tumblr.com/3fede86896756eb7e88871872cd13c8a/tumblr_n4d46tGZVi1rc8zlqo3_500.jpg)