title: Wing101 - Configure python 3.3.2 from 2.7.2 on a mac
body: <p>I am relatively new to programming, and I am using Wing101 version: 5.0.0-b8 (rev 29847). 
  The Python Shell within Wing101, is version 2.7.2, how do I configure it to open python 3.3.2.</p>
  
  <p>I have downloaded Python 3.3.2 and I need the custom Python Executable. I previously tried "/usr/bin/python" as my custom python executable, but it doesn't work.</p>
  
  <p>I am on a Mac 10.8.3</p>