Add Nupic formula to headonly

Numenta Platform for Intelligent Computing: a brain-inspired machine intelligence platform, and biologically accurate neural network based on cortical learning algorithms. 
http://numenta.org/

This is a monstrous and strange 'platform' to be putting into a formula, but the resulting system is useful to developers wishing to experiment with the nupic platform, but not comfortable with performing all the configuration and setup steps by hand.

I step around the environment variable requirement by writing shell wrappers around the key scripts used to engage the platform in analyzing some data. nupic_python.sh works fine for https://github.com/chetan51/linguist and should also work for other projects.