Revert "Updates nupic.core to c5e8e3a7d03b6edaa20276cda5fa1c13c7836711."

This reverts commit ae7ac7f089f6379496dc43b3c52d9ccefdb9a8c0.
Merge pull request #1253 from scottpurdy/master

Revert "Updates nupic.core to c5e8e3a7d03b6edaa20276cda5fa1c13c7836711."