add python 02

Quick and dirty, using this:
![numberedequation6](https://f.cloud.github.com/assets/1194436/1051858/b3a4f328-10d2-11e3-8c34-c8eb91053113.gif)
That I got from [Wolfram](http://mathworld.wolfram.com/FibonacciNumber.html), because Python's recursion depth is notoriously bad.  Took > 1 min to run recursively.