Updated setup config with proper classifiers and description

This will fix the description shown on https://pypi.python.org/pypi/nupic
I think we need to use the term "HTM". Suggestion (adapted from our website):

>Numenta Platform for Intelligent Computing: a machine intelligence platform that implements the HTM learning algorithms. HTM is a detailed computational theory of the neocortex. At the core of HTM are time-based continuous learning algorithms that store and recall spatial and temporal patterns. NuPIC is suited to a variety of problems, particularly anomaly detection and prediction of streaming data sources.