Adjust nupic for the merge of numenta/nupic.core#179

Fixes #1298 .

This PR is NOT ready to merge until:

* [ ] numenta/nupic.core#179 is merged
* [ ] `.nupic_modules` is updated accordingly
This PR shouldn't require a reference to an outside fork in .nupic_modules, even if meant to be temporary.  If these PRs need to be coordinated, let's get the nupic.core changes pushed to a branch on numenta/nupic.core so that at least the SHA is valid (even if not on master).