edx/edx-ora2 — pull request #446 by wedaly (2014-06-19 19:14:29+00:00)
Title: Use cPickle instead of pickle; add additional tests

`cPickle` is the (much) faster version of the `pickle` module. I've also added some additional tests from the `will/scikit-classifier` branch, in particular for testing that this plays nicely with JSON serialization.

@stephensanchez