Sparse Fascicle Model

This is a start on an implementation of the model we describe here: 

http://arxiv.org/abs/1411.0721

The main current issue with this is that this will have a local dependency on scikit-learn, because it uses ElasticNet for the fit. How do people feel about that? 
"But most importantly: know when to be inconsistent -- sometimes the style
guide just doesn't apply. When in doubt, use your best judgment. Look at
other examples and decide what looks best. And don't hesitate to ask!"

In this case, you have ``test_<some_method_or_object>``.  If that object
happens to be spelled with a capital letter, so be it.  But this is really
not important at all :)