Feature/print model weights script should print out intercept

This will satisfy #155 once merged. Also it doesn't break anything, at least according to the output of `nosetests` on my local machine. :smile: :+1: 
Now that this returns a tuple, it'd be awesome if you could update add a bit to the docstring here like:

```rst
:returns: Weights and intercept
:rtype: tuple(dict, list of tuples)
```