Updated to add python 3 support.

Tested in python 2.7 and 3.4 on Mac OS X: Mavericks. Can't test in other environments currently. Should work just fine.
![screen shot 2014-06-18 at 12 47 28 pm](https://cloud.githubusercontent.com/assets/3342777/3317759/c0b8cff6-f710-11e3-9668-695e36f17bc6.png)
![screen shot 2014-06-18 at 12 48 07 pm](https://cloud.githubusercontent.com/assets/3342777/3317760/c18af198-f710-11e3-9e62-98569d55798f.png)